旋转反挤压GW83合金的动态力学性能和微观组织  

DYNAMIC MECHANICAL PROPERTIES AND MICROSTRUCTURE OF GW83 ALLOY PREPARED BY ROTARY BACKWARD EXTRUSION

作　　者：陈喆 屈晓晓 闫钊明 Chen Zhe;Qu Xiaoxiao;Yan Zhaoming(Henan Iron and Steel Group Co.,Ltd;Henan Jinye New Material Science and Technology Co.,Ltd;Innovation Center of Science and Technology Industry of National Defense for Complex Component Extrusion Forming Technology)

机构地区：[1]河南钢铁集团有限公司,河南郑州450000 [2]河南省金冶新材料科技有限公司 [3]国防科技工业复杂构件挤压成形技术创新中心

出　　处：《河南冶金》2025年第1期7-10,46,共5页Henan Metallurgy

基　　金：山西省基础研究计划(No.20210302124206)。

摘　　要：为了满足轻型装甲车辆和单兵防护装甲对轻量化的需求,研究了采用旋转反挤压工艺制备的高性能GW83镁合金筒体在1000~5500 s^(-1)应变速率下的动态力学性能和微观组织。结果表明:采用旋转反挤压成形制备的GW83合金筒体晶粒得到明显细化,且承受高应变速率载荷后组织中孪晶比例明显增加。分离式霍普金森压杆试验结果表明:峰值应力随着应变速率的增加而增加,表现出正的应变速率增强效应。位于筒体下部的金属材料具有最高的极限抗压强度和吸收能量密度。在高应变速率下,GW83合金筒体各个区域的材料表现出韧性和脆性复合的断裂模式。The dynamic mechanical properties and microstructure of high-performance magnesium alloy cylinders prepared by rotary backward extrusion(RBE)were investigated at the strain rate of 1000~5500 s^(-1)to meet the demand for the lightweight requirements of light armored vehicles and individual armor protection.The results showed that the grain size of GW83 alloy cylinder prepared by rotary backward extrusion was significantly refined,and the proportion of twinning in the microstructure significantly increased after bearing high strain rate loads.The results of the Split Hopkinson Pressure Bar test showed that the peak stress increased with the increase of strain rate,exhibiting a positive strain rate enhancement effect.And the material located at the lower part of the cylinder has the highest ultimate compressive strength and absorbed energy density.Under high strain rates,the materials in various areas of the cylinder exhibit a composite fracture mode of ductileness and brittleness.

关 键 词：材料加工工程 GW83合金 旋转反挤压 动态力学性能 微观组织 

分 类 号：TG146.2[一般工业技术—材料科学与工程]