原位反应喷射沉积7075铝合金的塑性变形机理  

Plastic Deformation Mechanism of In-situ Reactive Spray Formed 7075 Al Alloy

作　　者：刘慧敏[1] 呼努斯图[2] 由国艳[1] 

机构地区：[1]内蒙古工业大学材料科学与工程学院,呼和浩特010051 [2]内蒙古师范大学物理与电子信息学院,呼和浩特010020

出　　处：《材料工程》2007年第9期58-61,共4页Journal of Materials Engineering

基　　金：内蒙古自治区自然科学基金项目(200408020705)

摘　　要：采用原位反应喷射沉积法制备TiCP/7075铝基复合材料,进行热模拟变形实验。研究了TiCP/7075铝基复合材料塑性变形后的微观组织与应力-应变曲线的变化规律,探索其塑性变形机理。结果表明:应力随变形温度的增加而下降,当变形温度达到400℃后,发生动态再结晶现象;变形温度达到450℃后,变形过程中的强化与软化效应保持平衡。The plastic deformation behavior of irrsitu reactive spray formed 7075 Al alloy during hot compression deformation was studied by isothermal compression test at Gleeble-1500 thermal-mechanical simulator. The dynamic recrystallization mechanism during hot compress was examined using SEM and the true stress-strain curves. The results show that the flow stress decreases with the increase of deforming temperature, dynamic recrystallization occurs at 400℃ of deforming temperature. When the deformation temperature increases to 450℃, the balance is remained between hardening and softening during hot compression deformation.

关 键 词：原位反应喷射沉积 7075铝合金 塑性变形 

分 类 号：TG146.2[一般工业技术—材料科学与工程]