摘要
作为核聚变堆包层候选结构材料,低活化钒合金具有较好的发展前景。为了获得高强度,在钒合金(V-4Cr-4Ti)中添加0.2wt%稀土元素Y,通过真空电弧熔炼方法获得V-4Cr-4Ti-0.2Y合金,并进行了1100℃/2 h固溶处理。通过光学显微镜分析了该合金的晶粒尺寸;采用扫描电镜和能谱仪对试样的形貌和成分进行分析;利用维氏硬度仪、电子万能实验机对合金进行了硬度、强度和塑性测试。结果表明:V-4Cr-4Ti和V-4Cr-4Ti-0.2Y的晶粒平均尺寸分别为292.5、236.29μm,说明含Y的钒合金晶粒更加细化。制备的试样中存在Y,出现了明显的Y_(2)O_(3)峰。添加稀土元素Y之后,V-4Cr-4Ti的维氏硬度、屈服强度、抗拉强度和伸长率均得到了提高。
Low activation vadanium alloys are promising candidate structural materials of blanket for nuclear fusion reactor.To improve the strength,0.2 wt%of rare earth element Y was added to vanadium alloy(V-4Cr-4Ti),and V-4Cr-4Ti-0.2Y alloy was obtained by vacuum arc melting method,then the alloy was subjected to solid solution annealing at 1100℃for 2 h.The grain size of the alloys was analyzed by optical microscopy.The morphology and composition of the alloy was confirmed by SEM and EDS.The hardness,strength and plasticity of alloys were tested by Vickers hardness tester and electronic universal testing machine.The results show that the average grain size of V-4Cr-4Ti and V-4Cr-4Ti-0.2Y are 292.5μm and 236.29μm,respectively,which indicate that the presence of Y-containing oxides could refine grains.Obvious Y_(2)O_(3)peak appears in X-ray diffraction analysis.The Vickers hardness,yield strength,tensile strength and elongation of V-4Cr-4Ti improve after the addition of Y.
作者
徐立群
胡心平
姜少宁
腾兴志
于长旺
XU Liqun;HU Xinping;JIANG Shaoning;TENG Xingzhi;YU Changwang(School of Mechanical and Automotive Engineering,Qilu University of Technology(Shandong Academy of Sciences),Ji'nan 250353,China)
出处
《热加工工艺》
北大核心
2021年第22期67-72,共6页
Hot Working Technology
基金
国家自然科学基金项目(51501097)
山东省自然科学基金项目(ZR2014EMP005)
校级大学生创新创业项目(xj201810431102)。
