热轧退火态Fe-6.5%Si合金的力学行为及形变机制  

Mechanical Behavior and Deformation Mechanism of Annealed Hot-Rolled Fe-6.5%Si Alloy

作　　者：王聪[1] 林栋樑[1] 单爱党[1] 陈家光[2] 曹涵清 陈英颖 

机构地区：[1]上海交通大学教育部高温合金和高温测试重点实验室,上海200030 [2]宝钢研究院分析测试研究中心,上海201900

出　　处：《上海交通大学学报》2002年第5期601-603,611,共4页Journal of Shanghai Jiaotong University

摘　　要：为揭示热轧退火态 Fe- 6.5 % Si(质量分数 )合金的形变机制 ,研究了该合金不同温度下的力学性能 ,并利用透射电子显微镜分析了其有序结构和拉伸样品中的位错组态 .结果表明 ,在中温拉伸过程中 ,热轧退火态 Fe- 6.5 % Si合金因位错塞积和位错缠结而导致加工硬化 ;该合金 B2有序结构温度下 ,出现了超点阵位错 ;在 80 0°C拉伸时 ,则呈现了 1 40In order to reveal the deformation mechanism of annealed hot rolled Fe 6.5%Si (mass fraction) alloy, mechanical properties of the alloy were investigated at different temperatures. TEM was applied to analyze the ordered structure of the alloy and the dislocation arrangement of strained samples under different temperatures. The results conclude that the alloy shows work hardening under mid temperatures because of dislocation pile up and tangling. And superdislocations were observed at temperatures of B2 ordered structure of the alloy. Finally, the elongation of the alloy reached 140% at 800°C.

关 键 词：有序相 透射电镜 位错 超点阵 

分 类 号：TG111.7[金属学及工艺—物理冶金] TG356.12[金属学及工艺—金属学]