The progress of study on the alloying of rare earth in steel by internal friction was introduced.
介绍了用内耗方法研究钢中稀土合金化取得的进展；
2
The diffusion zone width of main alloying elements increases and hardness of the friction weld zone near TC4 titanium alloy side improves after post-weld heat treatment.
经焊后回火热处理后，主要合金元素沿焊合区的扩散区宽度增大；焊合区钛合金侧硬度值显著提高。
3
The movement of the internal friction peak position is attributed to the effects of alloying elements and carbon atoms.