摘要
使用粉末冶金法及热挤压制备了纳米金刚石(ND)增强ZK60镁基复合材料(ND/ZK60),利用热-力模拟仪Gleeble 3500测试了其在不同变形温度(150、200、300和350℃)和应变速率(1、0.1、0.01和0.001 s^(-1))下的真应力-应变曲线;使用X射线衍射仪(XRD)测试了ND/ZK60镁基复合材料在变形温度为300℃及不同应变速率下的基面织构。结果表明:ND/ZK60镁基复合材料的真应力-应变曲线在不同变形温度和应变速率下发生了4个典型的阶段,且随着变形温度的升高和应变速率的减小,加工硬化现象逐渐减弱。变形温度为300℃时,挤压态的复合材料(0002)基面织构比不同应变速率下的复合材料基面织构强,且基面织构随着应变速率的减小而逐渐减弱。
Nano-diamond(ND) reinforced ZK60 magnesium matrix composites(ND/ZK60)were prepared by powder metallurgy and hot extrusion, and the true stress-strain curves of the composites at different deformation temperatures(150,200,300 and 350 ℃) and strain rates(1, 0.1, 0.01 and 0.001 s-1) were measured by a Gleeble 3500 thermal-force simulator. The basic texture of the ND/ZK60 magnesium matrix composites at deformation temperature of 300 ℃ and different strain rates was measured by X-ray diffractometer(XRD). The results show that the true stress-strain curves of the ND/ZK60 magnesium matrix composites take place in four typical stages at different deformation temperatures and strain rates, and work hardening gradually decreases with the increase of deformation temperature and the decrease of strain rate. When the deformation temperature is 300 ℃, the(0002) basal texture of the as-extruded composites is stronger than that of the composites at different strain rates, and the basic texture decreases with the decrease of the strain rate.
作者
李尚鹏
王金辉
金培鹏
LI Shang-peng;WANG Jin-hui;JIN Pei-peng(Qinghai Provincial Key Laboratory of New Light Alloys,Qinghai Provincial Engineering ResearchCenter of High Performance Light Metal Alloys and Forming,Qinghai University,Xining 8 10016,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2019年第2期15-20,共6页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51661028)
青海省科技项目资助(2017-ZJ-Y17)
