LF6铝合金超塑性的研究  

Study on the Superplasticity of Alloy LF6

作　　者：刘玉梅[1] 赵友昌 高玉琴 

机构地区：[1]吉林大学材料系

出　　处：《机械工程材料》1990年第1期30-32,共3页Materials For Mechanical Engineering

摘　　要：本文对LF6铝合金的超塑性作了研究。试样经500℃保温30min空冷,拉伸温度为530℃,应变速率2.22×10^(-4/s)得到延伸率为392%,m值为0.56;在各种应变速率下,拉伸温度500℃、530℃,σ～ε关系呈S曲线的形状;在超塑变形的试样中清楚观察到晶界滑移、晶粒大范围的转动(最大转角达40°左右)、晶界移动、亚结构出现及亚结构相对基体作较大角度转动。In this paper, the superplasticity of alloy LF6 was investigated. The sample was prepared with pre-processing at 500℃ for half an hour, then cooled in air. 392% elongation and m=0.59 were reached at strain rate of 2.22×10^(-4)S^(-1) and 550℃. At a certian range of strain rates and testing temperitures of 500℃ and 530℃, the σ～ε curve showed as S shape. In the superplastic defbrmed sample, the grain boundary sliding, grain rotation (the maximum rotation angle was about 40°), grain boundary displacement, aprearance of substructure and the large rotation of substructure relative to the original grains were observed.

关 键 词：铝合金 超塑性 LF6 

分 类 号：TG146.21[一般工业技术—材料科学与工程]