Chinese Welding Training and Qualification Committee (CANB) was awarded the authorisation of IIW in 2000, and has issued nearly 2000 IIW diplomas by the end of 2004. Since Harbin Welding Training Institute(WTI Harbin)...Chinese Welding Training and Qualification Committee (CANB) was awarded the authorisation of IIW in 2000, and has issued nearly 2000 IIW diplomas by the end of 2004. Since Harbin Welding Training Institute(WTI Harbin) was founded based on Sino-German cooperation in 1984, it has trained all kinds of welding personnel 20000 and it made important contribution to the up-to-date system introduction of international welding training to China. The common questions in Germany foreign aid programs are: when German experts were on site, the project was on the operation; when he/they left, only memory was left. The outstanding achievements of Harbin Welding Training Institute tell us: when German experts were away, the cooperation program is not only run normally, but also gets persistent development, it is the successful model among the cooperation projects between China and Germany.展开更多
The influence of aging time,measuring frequency and strain amplitude on the internal friction of TiNi51/TiNi50.2 sandwich composite was investigated.The DSC and internal friction measurements were employed to characte...The influence of aging time,measuring frequency and strain amplitude on the internal friction of TiNi51/TiNi50.2 sandwich composite was investigated.The DSC and internal friction measurements were employed to characterize the sample.The two internal friction peaks of the specimen were confirmed corresponding to the reverse transformation of TiNi51 and TiNi50.2 component, respectively.The internal friction as a function of the temperature at different measuring frequencies was presented and it was found that the height of both internal friction peaks increased with decreasing frequency;however,the increase corresponding to TiNi50.2 component was larger than that of TiNi51 component.Furthermore,the internal friction of the TiNi/TiNi composite alloy decreased with increasing the measuring strain amplitude.The height of internal friction peak of TiNi51 component increased with increasing the aging time,whereas that of the TiNi50.2 component did not change significantly.The increase in internal friction of TiNi51 appeared to be associated with the formation and growth of precipitate during the aging process.展开更多
文摘Chinese Welding Training and Qualification Committee (CANB) was awarded the authorisation of IIW in 2000, and has issued nearly 2000 IIW diplomas by the end of 2004. Since Harbin Welding Training Institute(WTI Harbin) was founded based on Sino-German cooperation in 1984, it has trained all kinds of welding personnel 20000 and it made important contribution to the up-to-date system introduction of international welding training to China. The common questions in Germany foreign aid programs are: when German experts were on site, the project was on the operation; when he/they left, only memory was left. The outstanding achievements of Harbin Welding Training Institute tell us: when German experts were away, the cooperation program is not only run normally, but also gets persistent development, it is the successful model among the cooperation projects between China and Germany.
基金Projects(5087112150671120)supported by the National Natural Science Foundation of China
文摘The influence of aging time,measuring frequency and strain amplitude on the internal friction of TiNi51/TiNi50.2 sandwich composite was investigated.The DSC and internal friction measurements were employed to characterize the sample.The two internal friction peaks of the specimen were confirmed corresponding to the reverse transformation of TiNi51 and TiNi50.2 component, respectively.The internal friction as a function of the temperature at different measuring frequencies was presented and it was found that the height of both internal friction peaks increased with decreasing frequency;however,the increase corresponding to TiNi50.2 component was larger than that of TiNi51 component.Furthermore,the internal friction of the TiNi/TiNi composite alloy decreased with increasing the measuring strain amplitude.The height of internal friction peak of TiNi51 component increased with increasing the aging time,whereas that of the TiNi50.2 component did not change significantly.The increase in internal friction of TiNi51 appeared to be associated with the formation and growth of precipitate during the aging process.
