【作者】 郭相龙； 李九霄； 王立强； 覃继宁； 吕维洁； 张荻；

【Author】 GUO Xiang-long,LI Jiu-xiao,WANG Li-qiang,QIN Ji-ning,LU Wei-jie,ZHANG Di (State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University,Shanghai 200240,China)

【机构】 上海交通大学金属基复合材料国家重点实验室；

【摘要】 利用Ti和LaB₆之间的化学反应,采用真空自耗电弧炉3次重熔制得TiB和La₂O₃增强的钛基复合材料,测得其相变点为1 045℃,然后经高温（1 100～1 050℃）锻造成板坯。在1 010℃对材料进行热轧,然后空冷,利用光学显微镜和扫描电镜研究变形量分别为40%、60%、80%、90%和95%时复合材料的显微组织和拉伸试样断口形貌。结果表明:当变形量到达到80%时,材料的强度一直上升,伸长率下降;变形量继续增大后,强度有所下降,伸长率提高。更多还原

【Abstract】 Utilizing the reaction between Ti and LaB₆,titanium matrix composite（TMC） plate reinforced with TiB and Lα₂O₃ was prepared by casting trice and hot-forging,its transformation temperature measured was 1 045℃.The TMC was rolled at 1 010℃,then air-cooled.The microstructure and fracture surfaces were studied by OM and SEM at deformation amount of 40%,60%,80%,90%and 95%.The results show that when the deformation amount reaches 80%, the strength of the composite material keeps on increasing,whereas the elongation decreases.However,if the deformation amount increases more,the strength of the material decreases slightly,and the elongation increases.更多还原