科研之友
微信
新浪微博
Facebook
分享链接
摘要
The martensitic structure in the air-cooled Cu-11.91Al-2.48Mn-0.1Zr (wt%) alloy and its variation upon heating has been studied by X-ray diffraction and TEM. The forward and reverse thermoelastic transformation behavior has been studied by voltage measurement. The shape memory ratio of the alloy aged at 150 degrees C (in martensite state) for different times up to 100 h, or heated to different temperatures up to 620 degrees C followed by air cooling, has been measured. The air-cooled state of the alloy has a monoclinic martensitic structure M18R, which closely matches the N18R structure. This structure remains almost unchanged when the alloy is heated to 400 degrees C. When the alloy is heated to 620 degrees C, only a small amount of gamma(2) phase precipitates and a shape memory ratio of 92% is achieved. When the alloy is aged at 150 degrees C for 100 h, a shape memory ratio of 97.2% is achieved.
- 出版日期2009-7-8
- 单位中南大学
