Stress corrosion is one of the least understood and most dangerous causes of fastener breakage.
Common causes include stress corrosion cracking, hydrogen embrittlement, hydrogen accelerated stress corrosion cracking, and stress embrittlement. The identity between these fracture m…
As we all know, at present, many furniture contain formaldehyde and other substances, but the content is different. How to buy qualified and assured furniture, really have to work hard. On November 5th, Lanzhou City Chengguan District Consumers Association issued a con…
According to reports, in the last week of November 2012, among the 168 chemical products tracked, the prices of 35 products rose last week, 81 products …
For years, scientists and engineers have been trying to find a good way to "use smaller, more efficient, two-dimensional graphene materials." Now, scientists have designed a graphene transistor that is ultra-low power and is expected to even…
Acr…
Every time I went back and took off my shoes, I didn't know where to put it. I wanted to put a shoe, but there was no entrance, or there was an entrance, but there was no shoe. In short, it looked very awkward. I wanted customization but I thought it was expensive. How can we create an…
The Hong Kong Polytechnic University held a press conference on the 12th, saying that the school has recently successfully developed the world's highest energy conversion efficiency perovskite/monocrystalline silicon tandem solar cell with energy …