The tensile strength is 1560 MPa. What is the concept?
There are many types of titanium alloys, and tensile strength is a very important indicator in cutting-edge titanium alloy research.
According to the index value of tensile strength, titanium alloys with high strength can be called "high-strength titanium alloys", which refers to titanium alloys with room temperature tensile strength between 1100 MPa and 1400 MPa. and metastable beta titanium alloy.
This is also the reason why the tensile strength of conventional titanium alloys is below 1400 MPa.
If the tensile strength value of titanium alloy is higher, it will break out of the 'conventional' category and be called 'ultra-high-strength titanium alloy'.
This type of titanium alloy is in the 'development stage' internationally.
Various countries and top institutions are doing research on 'ultra-high-strength titanium alloys', and some institutions and large companies have defined research indicators for ultra-high-strength titanium alloys.
For example, Americen's Boeing Company, their research indicators for super-strong titanium alloys are: tensile strength at room temperature greater than 1500 MPa, shear strength greater than 860MPa, elongation greater than 8%, loading stress equal to 45% of room temperature tensile strength The number of fatigue cycles at tensile strength is not less than 100,000 times, etc.
Under this data index, what is considered promising is a metastable beta titanium alloy with the serial number Ti8V5FelAl. Its typical mechanical properties reach a room temperature tensile strength of more than 1480 MPa and an elongation of 8%.
The titanium alloy now manufactured in the metal laboratory has a tensile strength of more than 1560 MPa, which is 50 MPa higher than the defined value of ultra-high-strength titanium alloy.
Although other properties have not been tested, titanium alloy has a very important feature. Its tensile strength and yield strength are similar in value, and other indicators, including titanium alloy, also have a certain relationship.
Even if other data indicators are not ideal, it doesn't matter much. The research project of the Metal Laboratory is originally a single-directional material science research. Their research purpose is to continuously improve the strength of titanium alloy so that the research and development results can provide titanium alloy Provide reference for material application research and development.
As long as the strength of the manufactured finished product is increased to a certain value, the project can be said to be completed.
Previously, the production of titanium alloys with a tensile strength of more than 1,400 MPa could be regarded as a settlement project, but the production of 1,560 MPa was simply unthinkable.
Titanium alloys with a strength exceeding 1,500 MPa can be produced by conventional means, which is currently unavailable in the world. In other words, they have achieved results that exceed the highest international level and are at the forefront of the research and development of ultra-high-strength titanium alloys.
Everyone in the metal laboratory knows what the number 1560 MPa represents.
Every one of them was excited.
Peng Hui's face was also flushed with excitement. He was excited for a while and even danced for a while. It took him a long time to calm down and start explaining his work. "Everyone, please be careful not to spread this matter!"
"Du Hai, you will continue to be responsible for testing."
"Wan Yiming, organize all the processes and data of this manufacturing. You must organize it in more detail. Every small number must be recorded!"
After he finished speaking, he added, "After sorting it out, I will send a copy to Professor Wang Hao."
"good!"
The laboratory continues to be busy.
…
Wang Hao received the experimental data from the metal laboratory that day. Because it was too late, he just glanced at the parameters of the finished product and knew that the expected goals had been achieved, so he went to sleep calmly.
The next day, he was in the mood to take a closer look at the experimental records.
The Metal Research Institute sent two experimental records, the last and this time, which produced titanium alloys with tensile strengths of 1410 MPa and 1560 MPa respectively.
Both experiments can be said to be very successful, and the process records and data content included are of great reference value.
Wang Hao can also confirm that his analysis is on the right path, but he still has to continue working hard, and the experimental data analysis work has not yet been completed.
The three subsequent courses last week brought another 63 points of inspiration improvement. The inspiration value has now reached 70 points, and is only 30 points short of reaching one hundred.
Wang Hao is still looking forward to it.
With the experience of doing data analysis for nano-micro experiments, I know that I can continue to improve the relevant analysis conclusions next time and continue to improve the strength of the finished product.
"Because it uses conventional manufacturing methods. If it can be increased to 1,700 MPa, it should be completely beyond the top international levels."
"Achieving this value is worthy of celebration."
Wang Hao thought while thinking, he was still very busy at work, and many things were piled up at the beginning of the month.
For example, a reporter interviews.
This time a reporter came to interview, mainly because "New Advances in Mathematics" released a new issue, and his research on finding Mersenne primes was published in the first article.
The publication of the paper also made the mathematical community continue to discuss Mersenne prime numbers, and many mathematical circles mentioned a name - 'Wang's conjecture'.
The review editor of "New Advances in Mathematics" also mentioned the 'Wang's conjecture' in his evaluation of the paper, "This is not a perfect proof, but a conjecture that can help find Mersenne prime numbers."
"Referring to information released by China and GIMPS, they found several Mersenne primes, including even a super-large Mersenne prime number of 100 million digits, which is enough to prove that the 'Wang's Conjecture' is true among Mersenne numbers of no more than 1 billion digits. .”
"Interestingly, starting from today, we have two conjectures about the study of Mersenne prime numbers..."
The other is Zhou's conjecture.
Zhou's conjecture is very famous. It describes the distribution of Mersenne prime numbers. Many mathematicians have carefully studied Mersenne prime numbers and tried to prove Zhou's conjecture, but they all ended in failure.
Compared with Zhou's conjecture describing distribution, Wang's conjecture has a clear purpose, which is to find Mersenne prime numbers.
Wang's conjecture also achieved its goal.
In a computable domain, it covers more than two-thirds of the Mersenne primes.
Compared with Zhou's conjecture, which even ordinary people can understand, the content of Wang's conjecture is much more complicated. The two functions created are a headache to look at. For those who are not graduate students in mathematics departments or above, even the content of the functions Neither can understand it.
The reporter came to interview Wang Hao because of the publication of a paper in "New Advances in Mathematics".
Some time ago, the research on Mersenne primes made a lot of noise and attracted great public attention. Reporters also wanted to know more about it, such as when the results report will be made.
Wang Hao briefly said a few words in the interview. He did not talk about the results, but made it clear that he would give a report at the Mathematical Science Center of Shuimu University after the year.
He said sincerely, "Professor Qiu Chengwen from the Mathematical Science Center invited me. I thought about it carefully and it would be easier to give a report there."
Wang Hao said nothing more after that.
"New Advances in Mathematics" published his paper, which had almost no impact on him.
Discussions in academic circles will not affect him, and his life will not be affected in any way, because the school and others have already known the news.
Meanwhile, there's other good news.
Northern Xinjiang Province has released the annual selection results for three provincial awards in natural science, technological invention and scientific and technological progress. Two of Wang Hao's personal studies won the second prize in Northern Xinjiang Province's natural science award and the first prize in technological invention respectively.
The one who won the second prize in natural science was "Proof of the Regularity of the Monge-Pey Equation"; and the one who won the first prize in technical invention was "Algorithm for Multiplication of Large Numbers".
Two studies won two awards, one was the first prize and the other was the second prize. Overall, it was very good.
Provincial awards are based on projects, and individual and team achievements will be competed together.
"Proof of the Regularity of the Monge-Pey Equation" is a world-class mathematical theoretical achievement. However, in fact, the competitiveness of the award is not high, because mathematics is not a subject participating in the award selection, and the results of other disciplines will also compete together. Winning the second prize in natural science already shows that you are taken seriously.
Of course.
If he were to participate in the selection with the argument of Artin's constant, he would definitely be able to easily win the first prize in the province's natural sciences.
Unfortunately, the research on Artin's constant was completed a little late. When it was completed and submitted, the selection for the provincial science awards had already begun, and we had to wait until next year.
At that time, it is likely to be submitted directly to participate in the selection of national science awards.
The science and technology awards in the two provinces are not only as simple as honors, but also receive a total of 350,000 tax-free bonuses. It is definitely good news to get more bonuses.
Wang Hao continued to devote himself to data analysis work with joy.
This is Monday at the beginning of the month.
Zhang Zhiqiang went to the finance department to collect his salary slip in the morning, and he also helped Wang Hao to collect it. He held the two salary slips in his hand and compared them. His good mood about paying wages was completely gone.
All he saw was his own salary slip, which showed that his final actual salary was 10,465 yuan.
For Wang Hao's account, after prepaying 20% of the personal income tax for the school subsidy, the actual salary was 314,028.
Zhang Zhiqiang stared at the two pay slips again and again, and thought about how he and Wang Hao were both professors at Xihai University. Why was there such a big gap?
At the end of the month, the salary was not even a fraction of the other party's.
Zhang Zhiqiang returned to the office with his salary slip, handed Wang Hao's one over, and then looked at it with envy and jealousy.
Wang Hao took it and glanced at the salary slip, frowning slightly, "Twenty thousand less, right? The subsidy for the paper published at the end of the month will be paid next month?"
He shook his head and put the pay slip in his pocket.
Keep your head down and keep doing your research.
Zhang Zhiqiang returned to his seat mechanically. Looking at Wang Hao's movements, body, and words throughout the whole process, he felt that his heart was flooded with tears.
The actual salary was 310,000, and he actually said he was still not satisfied?
Are you talking about tens of thousands less?
You seem to be used to that nonchalant look?
Zhang Zhiqiang lowered his head and looked at his salary slip again, looking at every number carefully. In the end, all his emotions turned into a long sigh.
Then he turned his head and looked out the window, his eyes slowly falling into a dull state.
He somewhat understood Luo Dayong.
…
at the same time.
The Metal Laboratory reported the results again to the Materials Science Department of the Natural Science Foundation.
After the Materials Science Department received the reported news, they initially thought it was a repeated report. After an expert glanced at it, they immediately called the Metal Laboratory and confirmed that it was a new development in research and development.
However, this new development is too exaggerated, and the speed is too fast!
The result reported last Monday was to create a titanium alloy with a tensile strength of 1410 MPa. Just a week later, it was reported that a titanium alloy with a tensile strength of 1560 MPa was manufactured?
1410 MPa, which has reached the standard of 'ultra-high-strength titanium alloy'. Normally, if the strength value increases by ten points, it can be regarded as a research breakthrough. A direct increase of 150 points can be described as 'incredible'. .
No.
It's 'can't believe it'!
Several resident experts from the Materials Science Department gathered together and immediately decided to notify other top experts to form a review team and go to the metal laboratory to see what the specific situation was.
The Materials Science Department of the Natural Science Foundation has a team of up to 200 review experts for key projects, most of which are scattered in various universities and R&D institutions. The top ones include 21 academicians of the Academy of Sciences and the Academy of Engineering, but most of them are In name only, it will only take action if there are truly unjudged and controversial results.
It's close to 'unjudgeable' now.
The Materials Science Department found Cao Dongming, one of the country's leading experts in the field of titanium alloys.
Cao Dongming is a researcher and doctoral supervisor at the Aeronautical Research Institute, and the chief technical expert of titanium alloy material technology of the Aviation Group.
Over the past two decades, Cao Dongming has led his team to innovate independently, completing 11 national key projects and completing countless titanium alloy application results. He has created an aerospace titanium alloy material system that is in line with the domestic situation. He has won numerous awards, including first and second prizes for scientific and technological progress, first and second prizes for scientific and technological achievements, first and second prizes for national defense prevention research, and so on.
Cao Dongming has countless honors and is considered the first person in the field of titanium alloy research and development in China.
When Cao Dongming heard that the Metal Laboratory of Xijing Jiaotong University had completed the research and development of ultra-high-strength titanium alloys, and the tensile strength of finished products manufactured by conventional methods was as high as 1,560 MPa, he was immediately shocked.
At the same time, I am also very curious.
He immediately decided to leave for Xijing Jiaotong University to see what the research in the metal laboratory was like.
Cao Dongming is very fast, much faster than other experts who are coming.
At noon on Wednesday, he arrived at Xijing Jiaotong University with only one student, and went straight to the metal laboratory without saying hello in advance.
Peng Hui knew that a team of experts would come from the Materials Science Department, but he did not expect that it would be Cao Dongming, and that it would come so quickly. The reception was a little rushed, so he had to take Cao Dongming to the office first.
Cao Dongming didn't care about entertainment or anything like that. He was more concerned about the research results and immediately asked about relevant matters.
Peng Hui took out a piece of shiny alloy from the box under the bookshelf. "This is the finished product. We have tested it in detail. The tensile strength at room temperature exceeds 1560 MPa."
"The yield strength is 1530 MPa, the shear strength is 1010 MPa, and the elongation is between 7.5% and 8.3%..."
He mentioned some other data.
Cao Dongming walked closer and touched the surface of the alloy with his hand. "The color should be brighter, and the aluminum content should be high, right? Professor Peng, can you tell us about the specific process? I heard from the Institute of Materials Science and Technology that the report you submitted last week, anti-resistance The tensile strength is 1410 MPa, so the test was wrong, or a new alloy was made."
The production of titanium alloy with a tensile strength of 1410 MPa by conventional means is also a very good result, but it does not surprise Cao Dongming. At most, he will only look for the manufacturing process as a way to study the need to improve the strength of titanium alloys. refer to.
The titanium alloy with a tensile strength of 1560 MPa can be said to have a qualitative breakthrough in strength, and the degree of attention is completely different.
Peng Hui said, "We have improved the manufacturing process and also controlled some processes, such as temperature adjustment during the smelting process, cooling process methods, etc. Because we need to increase the temperature faster, we have also used some other means..."
Cao Dongming listened to the constant nodding and asked curiously, "How do you know? That can help improve the strength of the final product."
Peng Hui hesitated for a moment, then explained, "I have an old friend, Xia Guobin, who introduced me to Wang Hao from Xihai University. Wang Hao, you know, right? He is the one who is often in the news, a mathematical genius."
"I've heard of Mersenne primes." Cao Dongming nodded.
"Yes! That's him."
Peng Hui continued, "Professor Wang Hao is not only doing mathematical theoretical research, he is also a top data mining expert, helping us analyze the experimental data and draw some conclusions. We will improve the processes and processes based on the conclusions. "
"Professor Wang Hao has made a great contribution to the completion of this research. I also ranked Wang Hao second on the list of people who reported the results this time."
The second position is already the highest.
Peng Hui is the applicant and person in charge of the project, so he must be ranked first. No matter how great the contributions of others are, they can only be ranked second.
Cao Dongming was a little confused when he heard this. He thought about it carefully and said strangely, "I remember that last week, I saw Wang Hao in the investigation report on the interruption of a titanium alloy project of the Aviation Group. He was doing data work. , but it seems that he does not understand materials science and did not find the error in the reported experimental data. Why..."
"Are you sure you're not mistaken?"
"Is it Wang Hao, who got a doctorate from Donggang University and was dismissed from Donggang University?"
Peng Hui actually laughed, and he said with great certainty, "It's that Wang Hao!"
"Professor Cao, you don't have to doubt it. There was such a big fuss some time ago, and you must have heard about Donggang's dismissal of Wang Hao, right?"
Cao Dongming nodded.
"Donggang University fired its own faculty and staff without conducting a careful investigation. This kind of thing can be done. The report submitted pinned the problem on Wang Hao. What's the big deal?"
"The projects at Donggang Alloy Laboratory have been interrupted, who cares about that?"
"Right."
Cao Dongming thought for a moment that this was indeed the case, and he suddenly became more interested in Wang Hao's analysis work. "Professor Peng, can you take a look at the data analysis report? I want to go through the entire R&D and manufacturing process. "
"Of course, no problem, please come this way."
Peng Hui said and took the lead towards the data analysis office.
(Ask for monthly ticket)
