周伟.一种新型高强钛合金热处理过程中的初生相形态演变和力学性能的研究[J].稀有金属材料与工程,2017,46(10):2852~2856.[Zhou Wei.The evolution of primary α phase morphology and mechanical properties of a new high-strength titanium alloy during heat treatment[J].Rare Metal Materials and Engineering,2017,46(10):2852~2856.]
一种新型高强钛合金热处理过程中的初生相形态演变和力学性能的研究
投稿时间:2016-07-26  修订日期:2016-09-20
中文关键词:  热处理,钛合金,初生α相,力学性能
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目);国家科技攻关计划
中文摘要:
      本文对一种新型高强β钛合金热处理过程中初生α相形貌演变和力学性能进行了研究。结果表明:α/β区双重固溶处理时初生α相在原有近球形晶粒基础上呈现球状生长;当固溶后以0.5℃/min冷却速率下炉冷,除部分初生α相依然保持近球状生长,另有部分α相出现了α相端面的“叉型”结构定向生长特征。新型合金α/β区固溶后空冷+时效处理后获得的细小等轴或短棒状初生α相与针状次生α相的混合组织具有优异的强-塑性匹配(1300MPa,延伸率10.5%)。当固溶后炉冷+时效处理合金在抗拉强度1000MPa,延伸率19%,断面收缩率45%时具有优异的断裂韧性(≥80 MPa?M1 / 2),认为该合金是一种优良的结构材料。
The evolution of primary α phase morphology and mechanical properties of a new high-strength titanium alloy during heat treatment
英文关键词:heat treatment, titanium alloy,primary α phase,mechanical properties
英文摘要:
      The evolution of primary α phase morphology and mechanical properties of a new high-strength titanium alloy during heat treatment were investigated. The results show that the primary α phases tend to globular growth feature on the basis of the equiaxed α phases underα/β zone double solution treatment at air cooling process. But abnormal growth of primary α grains occurs in the 0.5℃/minfurnace cooling processwhich except some primary alpha remains spherical growth, another parts evolve similar “fork” shapeddendritic growth rather than keep nearly spherical growth trend. The new titanium alloy leads to attractive combinations of strength and ductility (≈1300MPa of ultimate strength with 10.5% of elongation) at the microstructures obtained a few equiaxed or thin billet-like primary α phase and fine lamellar secondary α phase under α/β solution treatment followed by air cooling plus aging.The new alloyafter α/β solution treatment followed furnace cooling to low temperature and then aging heat treatment process has an excellent values (≥80 MPa?m1/2). Meanwhile, the elongation and reduction ofarea remain at about 19% and 45% respectively, and its corresponding tensile strength maintains at about1000 MPa.It can be assumed that the alloy may be a usable structural material.
作者单位E-mail
周伟 西北有色金属研究院 zhouwei2002563@163.com 
摘要点击次数: 59
全文下载次数: 19
查看全文  查看/发表评论  下载PDF阅读器
关闭