首页
登录
注册
退火态Zr55A110Ni5Cu30块体非晶合金在轧制过程中的自由体积演化
Free volume evolution of pre-annealed Zr55AlloNisCu3o bulk metallic glass during rolling
-
摘要: 将Zr55All0Ni5Cu30块体非晶合金在715K等温退火30min，引入少量纳米晶，然后于室温以不同的应变速率进行轧制，用差示扫描量热仪考察不同应变量样品的热稳定性和自由体积演化．结果表明：即使轧制到95％的最大应变量，样品的热稳定性也几乎没有发生改变．在各种应变速率下，随着应变量的增加，自由体积含量持续上升．但随着应变速率的增加，相同应变量下自由体积的含量先上升后降低，该规律与单一非晶态结构合金在塑性变形过程中自由体积的变化情况截然不同．Abstract: Traces of nanocrystals are introduced into Zr55AlloNisCu30 bulk metallic glass through isothermally annealing the glass at 715 K for 30 min. The pre-annealed samples are rolled at different strain rates up to 95% thickness reduction at room temperature. The thermal stability and the free volume of the deformed sample are examined by differential scanning calorimetry. It is found that the thermal stability does not change with deformation degree. At any strain rate, free volume content increases continuously with the increase of deformation degree without saturation. As strain rate increases, however, the free volume content with the same deformation degree first increases and then decreases, which is significantly different from the case of the metallic glass with monolithic amorphous structure under plastic deformation.
-
-
计量
- 文章访问数: 465
- HTML全文浏览数: 77
- PDF下载数: 0
- 施引文献: 0
下载: