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20MPa壓應(yīng)力下Ti-1300合金ω相變研究
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1.貴州大學(xué) 材料與冶金學(xué)院,1.貴州大學(xué) 材料與冶金學(xué)院,1.貴州大學(xué) 材料與冶金學(xué)院,1.貴州大學(xué) 材料與冶金學(xué)院

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國(guó)家自然科學(xué)(51401058)


Study on ω phase transformation of Ti-1300 alloy under 20MPa compressive stress
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1.College of Material and Metallurgy Engineering,Guizhou University,1.College of Material and Metallurgy Engineering,Guizhou University,1.College of Material and Metallurgy Engineering,Guizhou University,1.College of Material and Metallurgy Engineering,Guizhou University

Fund Project:

National Natural Science Foundation of China (51364024, 50364002); Foundation of State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials (SKL 1316); Gansu Province Department of Education Fund (2013A-029)

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    摘要:

    本文采用高分辨膨脹儀DIL 805 A/D研究了20MPa壓應(yīng)力作用下Ti-1300合金在連續(xù)加熱過程中ω相變。結(jié)果表明：20MPa壓應(yīng)力抑制Ti-1300合金在連續(xù)加熱時(shí)ω相變，相變開始點(diǎn)較無應(yīng)力時(shí)有一定滯后。根據(jù)Kissinger-Akahira-Sunose模型計(jì)算得出20MPa壓應(yīng)力作用下Ti-1300合金的ω相變的平均激活能為73KJ/mol，高于無應(yīng)力條件下的平均相變激活能（55KJ/mol），亦說明壓應(yīng)力對(duì)合金的ω相變有一定的抑制作用，使β→ω相變更加困難。然而連續(xù)加熱轉(zhuǎn)變中，隨ω相轉(zhuǎn)變量的增加而相變激活能逐漸減小，說明壓應(yīng)力對(duì)ω相變的抑制作用逐漸減弱。

    Abstract:

    The ω phase transformation of Ti-1300 alloy under 20MPa compressive stress during continuous heating was investigated using high resolution dilatometer DIL 805 A/D. Results show that the ω phase transformation of Ti-1300 alloy could be inhibited by 20MPa compressive stress during continuous heating. The local activation energy of ω phase transformation for Ti-1300 alloy was determined on the basis of Kissinger–Akahira–Sunose(KAS) method. The average activation energy of ω phase transformation is about 73 KJ/mol under 20MPa compressive stress, which is higher comparing with no stress condition (55KJ/mol ). However, the compress stress was able to certain inhibit the ω phase transformation of Ti-1300 alloy during continuous heating. Therefore, owing to the activation energy decresed with increase of transformed volume fraction fω, the inhibiting effect of compressive stress on ω phase transformation of Ti-1300 alloy was gradually weakened.

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張珍宣,雷旻,萬明攀,馬瑞.20MPa壓應(yīng)力下Ti-1300合金ω相變研究[J].稀有金屬材料與工程,2017,46(11):3277~3281.[Zhang Zhenxuan, Lei Min, Wan Mingpan, Ma Rui. Study on ω phase transformation of Ti-1300 alloy under 20MPa compressive stress[J]. Rare Metal Materials and Engineering,2017,46(11):3277~3281.]
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  • 收稿日期:2015-08-07
  • 最后修改日期:2016-01-08
  • 錄用日期:2016-02-24
  • 在線發(fā)布日期: 2017-12-13
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