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TC17鈦合金片狀組織球化演變及Burgers關(guān)系的缺失
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西北工業(yè)大學(xué)凝固技術(shù)國家重點(diǎn)實(shí)驗(yàn)室,西北工業(yè)大學(xué)凝固技術(shù)國家重點(diǎn)實(shí)驗(yàn)室,西北工業(yè)大學(xué)凝固技術(shù)國家重點(diǎn)實(shí)驗(yàn)室

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教育部博士點(diǎn)基金(20136102110034)；新世紀(jì)優(yōu)秀人才支持計(jì)劃(NCET-07-0696)


The microstructure evolution and the loss of Burgers orientation relationship during dynamic globularization for TC17 titanium alloy
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State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,710072,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,710072,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,710072

Fund Project:

National Basic Research Program of China (2011CB610302); National Natural Science Foundation of China (51301141)

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    摘要:

    采用EBSD技術(shù)研究了TC17鈦合金片狀組織在熱變形過程中的球化演變規(guī)律，并對比分析了變形前后α相與β相間Burgers關(guān)系的變化。結(jié)果表明，熱變形導(dǎo)致β相發(fā)生明顯的動(dòng)態(tài)再結(jié)晶。變形初期片狀組織內(nèi)部首先形成位錯(cuò)亞結(jié)構(gòu)，隨后在動(dòng)態(tài)回復(fù)作用下形成小角度晶界；隨著變形的增大，亞晶界轉(zhuǎn)化為大角度晶界導(dǎo)致片狀α的破裂；破碎α相的相界再通過擴(kuò)散作用繼續(xù)遷移，最終實(shí)現(xiàn)α相的球化。熱變形在改變片狀組織形貌和穩(wěn)定性的同時(shí)，也破壞了片狀組織中α相和β相間嚴(yán)格的Burgers關(guān)系，熱變形過程中柱滑移和其他滑移系或?qū)\晶系的啟動(dòng)，是造成α相與β相間嚴(yán)格Burgers關(guān)系破壞的根本原因。

    Abstract:

    The microstructure evolution and the change of Burgers orientation relationship between α and β phase of TC17 titanium alloy with initial lamellar microstructure were analyzed and researched by EBSD. The results shown that dynamic recrystallization of β phase was occured during hot deformation process. Meanwhile, the dynamic globularization of α phase contained the formation of subboundary and the fragmentation of α phase. The fragmentized α phase was eventually transformed to globularized particle. Meanwhile, the strict Burgers orientation relationship between α and β phase was destroyed, which was due to the activation of prismatic slip system and othe slip or twin system.

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引用本文

賈志強(qiáng),曾衛(wèi)東,王凱旋. TC17鈦合金片狀組織球化演變及Burgers關(guān)系的缺失[J].稀有金屬材料與工程,2017,46(10):2895~2899.[Zhiqiang Jia, Weidong Zeng, Kaixuan Wang. The microstructure evolution and the loss of Burgers orientation relationship during dynamic globularization for TC17 titanium alloy[J]. Rare Metal Materials and Engineering,2017,46(10):2895~2899.]
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  • 收稿日期:2015-08-04
  • 最后修改日期:2015-09-28
  • 錄用日期:2015-10-13
  • 在線發(fā)布日期: 2017-12-01
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