Tensile strength 1560 MPa, what is the concept?
There are many types of titanium alloys, and in cutting-edge titanium alloy research, tensile strength is a very important indicator.
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, consisting of nearly beta titanium alloys.
Composed of 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.
Top institutions in various countries 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 is greater than 1500 MPa, shear strength is greater than 860MPa, elongation is greater than 8%, and loading stress is 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 produced in the metal laboratory now 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 have similar values, 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.
In the past, 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.
Everyone is excited, everyone is excited.
Peng Hui's face was also flushed with excitement. He was excited for a while and even danced a little. 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 them 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 calmly went to bed and rested.
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.
These two experiments can be said to be very successful, and the process records and data content included are of great reference value.
Wang Hao is also sure that the analysis he has made is on the right path, but he still has to continue to work 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 very much.
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.
.”
"What's interesting is that 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 the field that can be calculated, 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. Even if you are not a graduate student in mathematics department or above, even the content of the function
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 discuss the content of 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 other people have already known the news.
Meanwhile, there's other good news.
Northern Xinjiang Province has released the annual selection results for the province's three awards in natural science, technological invention and scientific and technological progress. Two of Wang Hao's personal studies won the second prize in natural science and the first prize in technological invention in Northern Xinjiang Province respectively.
The one who won the second prize in natural science was "Proof of the Regularity of the Monge-Péy 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 highly valued.
Of course.
If he were to participate in the selection with the argument of Artyn'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 very likely that I will submit my application directly to participate in the selection of national science awards.
The science and technology awards in the two provinces are not just as simple as honors, but can 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 great joy.
This is the Monday of the first month of the month.
Zhang Zhiqiang went to the finance department to collect his salary slips in the morning, and he also helped Wang Hao to collect them. He held the two salary slips in his hand and compared them. His good mood about paying wages was completely gone.
I only saw his own salary slip, and the 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 is 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?"
To be continued...