摘要
用放电等离子烧结技术(SPS)制备钛合金/不锈钢复合板,模拟计算连接界面处的电流密度场、温度场和应力场并分析了复合材料的微观组织、界面微纳力学行为和拉伸性能。结果表明:在高能脉冲电流的作用下发生短时尖端放电使连接界面处的温度瞬间升高,连接界面相对平直并发生了明显的Ti、Fe、Cr原子扩散,在界面处生成了少量的TiFe、TiFe_(2)和FeCr等金属间化合物。结合界面处金属间化合物的硬度达到3.557 GPa,远高于两侧金属基体(钛合金2.943 GPa,不锈钢2.717 GPa)的硬度。钛合金/不锈钢复合板的拉伸强度可达385.7 MPa,分别为钛合金母材和不锈钢母材的72%和80%。在拉伸过程中,不锈钢板解理断裂后钛合金板承载直至发生典型的韧性断裂。
Composite plates of titanium alloy/stainless steel were prepared by spark plasma sintering(SPS),and their microstructure,micro-nano mechanical behavior and tensile properties were investigated.Results show that the temperature of the interface of titanium alloy/stainless steel rises fast owing to the short time spark discharge under the action of high energy pulse current.The interface is relatively flat,while inter-diffusion of Ti,Fe and Cr atoms occurs obviously.A small number of intermetallic compounds TiFe,TiFe_(2) and FeCr formed at the interface.The hardness of the zone with brittle intermetallic compounds reached 3.5578 GPa,which is much higher than that of metal matrix on both sides(Ti-2.943 GPa,Steel-2.717 GPa).The tensile strength of the titanium alloy/stainless steel composite is 387.5 MPa,which is 72%and 79%of the base material of titanium alloy and stainless steel respectively.During the tensile process,cleavage fracture first occurs on the stainless-steel side,while the titanium alloy side continues to bear the load until the typical ductile fracture occurs.
作者
刘瑞峰
仙运昌
赵瑞
周印梅
王文先
LIU Ruifeng;XIAN Yunchang;ZHAO Rui;ZHOU Yinmei;WANG Wenxian(Taiyuan University of Technology,College of Aeronautics and Astronautics,Taiyuan 030024,China;Shanxi Yangmei Chemical Machinery(Group)Co.Ltd.,Shanxi Key Laboratory of Coal Chemical Pressure Vessels,Taiyuan 030032,China;Taiyuan University of Technology,College of Materials Science and Engineering,Taiyuan 030024,China)
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2023年第8期581-589,共9页
Chinese Journal of Materials Research
基金
国家重点研发计划(2017YFB0602605)
山西省科技重大专项(MC2016-01,MC2016-02)
国家自然科学基金(52075360)
山西省应用基础研究项目(20210302124653)。
