Al元素对Ti-16Nb高温形状记忆合金微观组织与力学性能的影响  

Effect of Al Element on Microstructure and Mechanical Properties of Ti-16Nb High Temperature Shape Memory Alloy

作　　者：张颢月 陈强 刘爱莲[1] 闫傲 Zhang Haoyue;Chen Qiang;Liu Ailian;Yan Ao(Heilongjiang University of Science and Technology,Harbin 150022,China)

机构地区：[1]黑龙江科技大学,黑龙江哈尔滨150022

出　　处：《钛工业进展》2025年第1期8-13,共6页Titanium Industry Progress

基　　金：黑龙江省属高校基本业务费项目(2021-KYYWF-1457)。

摘　　要：为改善Ti-16Nb高温形状记忆合金的力学性能,利用真空非自耗电弧炉熔炼了不同Al含量的Ti_(84-x)Nb_(16)Al_(x)(x=0,1,2,3)合金,并采用光学显微镜(OM)、扫描电子显微镜(SEM)和万能材料试验机等研究了Al元素的加入及其含量对Ti-16Nb合金微观组织和力学性能的影响。研究发现,固溶态Ti_(84-x)Nb_(16)Al_(x)合金显微组织为母相β基体与其上弥散分布的大量针片状α''马氏体;加入适量的Al元素能够显著细化Ti_(84-x)Nb_(16)Al_(x)合金的晶粒尺寸;添加不超过3%(原子分数)的Al元素能够起到固溶强化和细晶强化的作用,显著提高Ti_(84-x)Nb_(16)Al_(x)合金的力学性能,并改善合金的形状记忆效应。In order to improve the mechanical properties of Ti-16Nb high temperature shape memory alloy,Ti_(84-x)Nb_(16)Al_(x)(x=0,1,2,3,6)alloys with different aluminum contents were melted using a vacuum non consumable arc furnace,and the effect of addition and content of aluminum element on the microstructure and mechanical properties of Ti-16Nb alloy were studied by optical microscope,scanning electron microscopy and universal testing machine.The results show that the microstructure of Ti_(84-x)Nb_(16)Al_(x) alloy is composed of large amount ofα″martensitic phase and parent phase β matrix.Adding an appropriate amount of aluminum element can refine the grains of Ti_(84-x)Nb_(16)Al_(x) alloy.Adding no more than 3at.%aluminum element can achieve solid solution strengthening and grain refinement strengthening,significantly improving the mechanical properties of Ti_(84-x)Nb_(16)Al_(x) alloy and enhancing its shape memory effect.

关 键 词：Ti-16Nb合金 AL元素 力学性能 微观组织 

分 类 号：TG146.23[一般工业技术—材料科学与工程]