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TB8鈦合金冷變形過程的組織演變及其熱處理時(shí)效響應(yīng)
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西北工業(yè)大學(xué)材料學(xué)院,西北工業(yè)大學(xué)材料學(xué)院,西北工業(yè)大學(xué)材料學(xué)院

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北京自然科學(xué)基金 (3132023)；國(guó)家自然科學(xué)基金 (51275494)；中央高?；緲I(yè)務(wù)費(fèi) (2012ZY51)；清華大學(xué)摩擦學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室開放基金 (SKLTKF11B04)


Microstructure Evolution during Cold-deformation and aging response after Annealing of TB8 titanium alloy
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School of Materials Science and Engineering,Northwestern Polytechnical University,Xi’an,School of Materials Science and Engineering,Northwestern Polytechnical University,Xi’an,School of Materials Science and Engineering,Northwestern Polytechnical University,Xi’an

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    摘要:

    鈦合金冷加工過程中組織演變行為取決于形變量,而冷形變組織的差異深刻影響著熱處理過程中的時(shí)效相變行為。本文利用場(chǎng)發(fā)射掃描電鏡(FE-SEM),X射線衍射儀(XRD),差熱分析儀(DSC),硬度分析(HV)等測(cè)試手段和分析方法,比較系統(tǒng)地研究了TB8鈦合金在冷加工過程中的組織演變以及隨后的熱處理時(shí)效強(qiáng)化響應(yīng)行為。結(jié)果表明：增高的FWHM是由于合金在冷變形中發(fā)生晶粒畸變和產(chǎn)生位錯(cuò)引起的,同時(shí)維氏硬度的增長(zhǎng)也伴隨著亞晶和畸變的增加。通過本文相變的研究說明冷變形對(duì)于α相析出相變行為的影響,并揭示了冷形變鈦合金存在特殊的時(shí)效相變行為。

    Abstract:

    The microstructure evolution of titanium alloy was decided with deformation rate in cold-deformation process, and substructure significantly influences phase transformation behavior in isothermal aging treatment. The microstructure evolution in cold-deformation and aging behavior of the TB8 alloy was investigated by X-ray diffraction (XRD), Vickers hardness (HV), field emission scanning electron microscope (FESEM) and differential scanning calorimeter (DSC). The high value of FWHM resulted from the combination of the grain distortion and dislocations, and the enhancement of the distortion and dislocations was indicated by increasing of HV value. The phase transformations of this study have reversed the effect of cold-deformation on transformation behavior of α phase precipitation in the β matrix. It suggested that there existed a possibility of a special behavior in the aging transformation of cold-deformation titanium alloy.

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徐鐵偉,李金山,張豐收. TB8鈦合金冷變形過程的組織演變及其熱處理時(shí)效響應(yīng)[J].稀有金屬材料與工程,2016,45(3):575~580.[Xu Tiewei, Li Jinshan, Zhang Fengshou. Microstructure Evolution during Cold-deformation and aging response after Annealing of TB8 titanium alloy[J]. Rare Metal Materials and Engineering,2016,45(3):575~580.]
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  • 收稿日期:2015-01-28
  • 最后修改日期:2015-08-09
  • 錄用日期:2015-09-06
  • 在線發(fā)布日期: 2016-07-07
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