杜赵新,刘国龙,刘飞,程军,陈艳飞,陈耘,黄东男,刘慧敏.预时效对粗晶β钛合金微观组织和机械性能的影响[J].稀有金属材料与工程,2019,48(3):770~774.[Du Zhaoxin,Liu Guolong,Liu Fei,Cheng Jun,Chen Yanfei,Chen Yun,Huang Dongnan,Liu Huimin.The influence of pre aging on microstructure and mechanical properties of coarse grained β titanium alloy[J].Rare Metal Materials and Engineering,2019,48(3):770~774.]
预时效对粗晶β钛合金微观组织和机械性能的影响
投稿时间:2017-09-21  修订日期:2017-12-03
中文关键词:  β钛合金  预时效  微观组织  细化  机械性能
基金项目:国家自然科学基金青年基金(51601099), 内蒙古自然科学基金(2016BS0506), 内蒙古工业大学校基金。(ZD201607),宁波市自然基金(2015A610077),内蒙古自治区科技创新引导项目
中文摘要:
      本文研究了预时效时间对粗大晶粒β钛合金组织与力学性能的演变。结果表明:预时效可以辅助次生α相形核,形成细小均匀的次生α,随着预时效时间延长,次生α相变得越细小;β钛合金对预时效处理很敏感,在粗晶条件下,仅经过550℃的单级时效强度仅为1340MPa,而经350℃预时效处理后,再经550℃的双级时效处理,强度可达到1760Mpa,和单级时效相比提高了30%;维氏显微硬度由于次生α相的细化,随着预时效时间的延长而增加。
The influence of pre aging on microstructure and mechanical properties of coarse grained β titanium alloy
英文关键词:β titanium  alloy, Pre  aging, Microstructure, Refinement, Mechanical  properties
英文摘要:
      The influence of pre aging heat treatment on microstructure and mechanical properties of coarse grained β titanium alloy has been studied in this paper. The pre aging heat treatment could serve as a precipitation step to provide uniform dispersed precursors for secondary α phase precipitation, and then leads to the dense, finely and homogenous distribution of secondary α phase. Prolonging of the pre aging time results in the finer scale of secondary α phase. The pre aging heat treatment strongly affects the mechanical properties of β titanium alloy. Within a coarse grain condition, the strength tested in this work is about 1340MPa when single aging at 550oC. However, the strength achieves to 1760MPa when pre aging at 350oC before 550oC, which increased by more than 30% compares to single aging. The micro hardness of the alloy also be improved markedly by pre aging. The effect of pre aging time on mechanical properties is that the prolonging of the pre aging time leads to the increase of strength and micro hardness, but the ductility is sacrificed, which is mainly due to the refinement of secondary α phase.
作者单位E-mail
杜赵新 内蒙古工业大学 材料科学与工程学院 471693363@qq.com 
刘国龙 内蒙古工业大学 材料科学与工程学院  
刘飞 内蒙古工业大学 材料科学与工程学院  
程军 西北有色金属研究院  
陈艳飞 中国兵器科学研究院宁波分院  
陈耘 中国兵器科学研究院宁波分院  
黄东男 内蒙古工业大学 材料科学与工程学院  
刘慧敏 内蒙古工业大学 材料科学与工程学院  
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