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預(yù)時(shí)效對粗晶β鈦合金微觀組織和機(jī)械性能的影響
作者:
作者單位:

1.內(nèi)蒙古工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院;2.西北有色金屬研究院;3.中國兵器科學(xué)研究院寧波分院

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通訊作者:

中圖分類號(hào):

TG111.5

基金項(xiàng)目:

國家自然科學(xué)基金青年基金(51601099), 內(nèi)蒙古自然科學(xué)基金(2016BS0506), 內(nèi)蒙古工業(yè)大學(xué)?；?。(ZD201607),寧波市自然基金(2015A610077),內(nèi)蒙古自治區(qū)科技創(chuàng)新引導(dǎo)項(xiàng)目


The influence of pre aging on microstructure and mechanical properties of coarse grained β titanium alloy
Author:
Affiliation:

1.School of Materials Science and Engineering,Inner Mongolia University of Technology;2.Northwest Institute for Nonferrous Metal Research,Xi’an;3.Ningbo Branch of China Ordnance Academy,Ning Bo

Fund Project:

National Natural Science Foundation of China(51601099), Natural Science Foundation of Inner Mongolia Autonomous Region of China (2016BS0506), Project supported by Inner Mongolia University of Technology (ZD201607), Ningbo Natural Science Foundation (2015A610077),Inner Mongolia Autonomous Region Science and Technology Innovation Guide Project

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    摘要:

    本文研究了預(yù)時(shí)效時(shí)間對粗大晶粒β鈦合金組織與力學(xué)性能的演變。結(jié)果表明：預(yù)時(shí)效可以輔助次生α相形核,形成細(xì)小均勻的次生α,隨著預(yù)時(shí)效時(shí)間延長,次生α相變得越細(xì)小；β鈦合金對預(yù)時(shí)效處理很敏感,在粗晶條件下,僅經(jīng)過550℃的單級(jí)時(shí)效強(qiáng)度僅為1340MPa,而經(jīng)350℃預(yù)時(shí)效處理后,再經(jīng)550℃的雙級(jí)時(shí)效處理,強(qiáng)度可達(dá)到1760Mpa,和單級(jí)時(shí)效相比提高了30%；維氏顯微硬度由于次生α相的細(xì)化,隨著預(yù)時(shí)效時(shí)間的延長而增加。

    Abstract:

    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.

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引用本文

杜趙新,劉國龍,劉飛,程軍,陳艷飛,陳耘,黃東男,劉慧敏.預(yù)時(shí)效對粗晶β鈦合金微觀組織和機(jī)械性能的影響[J].稀有金屬材料與工程,2019,47(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,2019,47(3):770~774.]
DOI：10.12442/j. issn.1002-185X.20170854

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  • 收稿日期:2017-09-21
  • 最后修改日期:2017-12-03
  • 錄用日期:2018-03-12
  • 在線發(fā)布日期: 2019-04-10
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