Ti元素对工业级Zr-Ti合金板材组织及力学性能的影响  

Effect of Ti Element on the Microstructure and Mechanical Properties of Industrial Grade Zr-Ti Alloy Sheet

作　　者：魏统宇 严宝辉 田锋 周宣 袁波 孙涛涛 WEI Tong-yu;YAN Bao-hui;TIAN Feng;ZHOU Xuan;YUAN Bo;SUN Tao-tao(Xi'an Western Energy Material Technologies Co.,Ltd.,Xi'an 710016,China)

机构地区：[1]西安西部新锆科技股份有限公司,陕西西安710016

出　　处：《稀有金属与硬质合金》2024年第4期64-68,共5页Rare Metals and Cemented Carbides

基　　金：中国原子能“燎原计划”科研项目(20221101)。

摘　　要：通过真空自耗电弧熔炼得到了不同Ti含量(质量分数0~15%)的Zr-Ti合金,并制备成板材样品。借助光学显微镜(OM)分析了不同合金板材的金相组织,利用维氏硬度计及万能电子拉伸试验机研究了不同合金板材的力学性能,并采用扫描电镜(SEM)观察了不同合金板材的断口形貌。结果表明:Ti元素对Zr-Ti合金的组织有明显细化作用;随着Ti含量的增加,Zr-Ti合金板材的硬度和强度明显提高,但伸长率明显降低;合金板材的断口形貌均由韧窝组成,皆为韧性断裂,且随着Ti含量的增加,合金板材断口的韧窝变浅,说明合金的韧性断裂特征减弱,加工性能变差。Zr-Ti alloys with different Ti contents(0~15%by mass)were first prepared by vacuum consumable arc melting,and then turned into sheet samples.The metallographic microstructure of different alloy sheets was analyzed by optical microscope(OM),the mechanical properties by Vickers hardness tester and universal electronic tensile testing machine,and the fracture morphology by scanning electron microscope(SEM).The results show that Ti element can obviously refine the microstructure of Zr-Ti alloy.With the increase of Ti content,the hardness and strength of the Zr-Ti alloy sheets significantly improve,but the elongation decreases markedly.The fracture morphology of all the Zr-Ti alloy sheets is composed of dimples,indicating ductile fracture.And with the increase in Ti content,the fracture dimples of the alloy sheets become shallower,indicating that the ductile fracture characteristics of the alloy are weakened and the machinability is deteriorated.

关 键 词：Zr-Ti合金 TI含量 金相组织 力学性能 断裂形式 

分 类 号：TG146.414[一般工业技术—材料科学与工程]