摘要
采用Gleeble 15 0 0热 力模拟试验机 ,对铸态 14 2 0铝锂合金在变形温度为 3 5 0℃～ 45 0℃、应变速率为0 .0 1s- 1 ～ 10 .0s- 1 的条件下 ,进行高温拉伸热模拟实验研究。利用扫描电镜、能谱分析、X射线衍射以及金相实验等手段对该合金的热变形穿晶韧性断裂进行分析。结果表明 ,Al3Fe相的存在是引起 14 2 0铝锂合金热变形穿晶韧性断裂的根本原因。
Study on tensile thermal simulation tests at high temperatures are carried out by Gleeble-1500 thermal simulator for as-cast 1420 Aluminium-Lithium alloy under deformation temperatures (℃) of from 300 to 400 and strain rates (s -1 ) of from 0.01 to 10.0 with the aids of SEM, energy spectrum analysis, XRD and OM, the transgranular ductile fracture during hot deformation for the alloy is analyzed. The result shows that the existence of Al_3Fe phases is the essential reason that induces the transgranular ductile fracture of 1420 Al-Li alloy during hot deformation.
出处
《机械强度》
CAS
CSCD
北大核心
2003年第2期219-221,共3页
Journal of Mechanical Strength
关键词
韧性断裂
铝锂合金
热变形
穿晶断裂
Aluminium-Lithium alloys
Hot deformation
Transgranular fracture
