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魏氏組織TC17鈦合金絕熱剪切帶(ASB)的組織與織構(gòu)
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西北工業(yè)大學(xué),西北工業(yè)大學(xué),西北工業(yè)大學(xué),西北工業(yè)大學(xué),西北工業(yè)大學(xué),西北工業(yè)大學(xué)

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國家自然科學(xué)基金資助(項(xiàng)目號(hào)51201135)、陜西省自然科學(xué)基金(2017JM5085)


Microstructure and Texture of Adiabatic Shear Band (ASB) in TC17 Titanium Alloy with widmanstatten microstructure
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Northwestern Polytechnical University,,,,,

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    摘要:

    本文利用熱模擬試驗(yàn)機(jī)對(duì)原始組織為魏氏組織的TC17鈦合金進(jìn)行了熱壓縮試驗(yàn),采用電子背散射衍射技術(shù)(EBSD)研究了不同變形參數(shù)對(duì)魏氏組織TC17鈦合金材料顯微組織與結(jié)構(gòu)的影響。結(jié)果表明：在700℃以上進(jìn)行熱壓縮變形時(shí),魏氏組織TC17鈦合金的材料均發(fā)生絕熱剪切行為,所形成的ASB中心區(qū)域組織主要由動(dòng)態(tài)再結(jié)晶形成的等軸狀β相晶粒和少量α相組成。隨變形溫度升高,殘余α相略有增加,β相晶粒尺寸增大。不同變形參數(shù)對(duì)于ASB中心區(qū)域β相的取向分布影響甚微,在β相中主要形成高絲織構(gòu)。同時(shí)絕熱剪切敏感性的研究表明,魏氏組織TC17鈦合金具有較高的絕熱剪切敏感性,且隨變形溫度升高,絕熱剪切敏感性增強(qiáng)。

    Abstract:

    Hot compression tests were carried out on TC17 titanium alloy by using thermal simulation testing machines, and the influence of different deformation parameters on the morphology and structure of TC17 titanium alloy with widmanstatten microstructure was characterized by Electron Back Scattered Diffraction (EBSD) techniques. The results show that adiabatic shear bend (ASB) occurs in the TC17 alloy with widmanstatten microstructure while the hot compression deformation temperature is over 700℃, and the central region of ASB is mainly composed of equiaxed β-phase grains formed by dynamic re-crystallization and a small amount of α-phase. The residual α phase and also the β-phase grain size increase with increasing of the hot compression temperature. Different deformation parameters have little effect on the orientation distribution of β-phase in the central region of ASB, and Goss texture mainly forms in β-phase. Furthermore, the research shows that the TC17 titanium alloy with widmanstatten microstructure has good adiabatic shear sensitivity, and it increases gradually with the increase of the hot compression deformation temperature.

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黃 斌,任維佳,張艷敏,陳爽,楊延清,羅賢.魏氏組織TC17鈦合金絕熱剪切帶(ASB)的組織與織構(gòu)[J].稀有金屬材料與工程,2018,47(9):2705~2710.[Bin Huang, Weijia Ren, Yanmin Zhang, Shuang Chen, Yanqing Yang, Xian Luo. Microstructure and Texture of Adiabatic Shear Band (ASB) in TC17 Titanium Alloy with widmanstatten microstructure[J]. Rare Metal Materials and Engineering,2018,47(9):2705~2710.]
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  • 收稿日期:2018-01-21
  • 最后修改日期:2018-03-22
  • 錄用日期:2018-04-04
  • 在線發(fā)布日期: 2018-11-01
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