重庆大学学报(自然科学版)2001，Vol.24Issue(3)：127-131,5.
1420Al-Li合金高温塑性变形沿晶断裂行为分析
Analysis of the Intergranular Fracture Behavior of High Temperature Plastic Deformation of 1420 Al-Li Alloy
摘要
Abstract
Al-Li alloys have poor processable plasticity, and at high temperature they have intergranular brittle phenomena whose mechanism of fracture hasn't been systematically studied at home and oversea up to date. Tensile deformation hot simulation test of cast 1420Al-Li alloy is performed on Gleeble-1500 Thermal Simulator over the range of deformation temperature from 350 ℃ to 450 ℃, strain rate from 0.01 s－1to 10 s－1.Tensile fracture behavior of 1420Al-Li alloy at high temperature is studied on the basis of the experiment. The results show 1420Al-Li alloy tensile fracture mode at high temperature is changed from typical transgranular ductile fracture to intergranular brittle fracture along with the increasing of deformation temperature and strain rate. The studies make out that hydrogen is the fundamental reason for intergranular brittle fracture of 1420Al-Li alloy at high temperature. The mechanism of hydrogen embrittlement of 1420Al-Li at high temperature is discussed, and a viewpoint that hydrogen embrittlement at high temperature is an integrated function of dynamical and static forces is proposed, it enriches and developes the theory of hydrogen embrittlement.关键词
铝锂合金/高温塑性变形/氢脆/沿晶断裂分类
矿业与冶金引用本文复制引用
刘雪峰,汪凌云,黄光杰..1420Al-Li合金高温塑性变形沿晶断裂行为分析[J].重庆大学学报(自然科学版),2001,24(3):127-131,5.基金项目
航天工业总公司国防军工配套研制项目 （）
