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Ti6321鈦合金再加載力學(xué)行為研究
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1.北京理工大學(xué)材料學(xué)院;2.洛陽船舶材料研究所

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YBKT17-06


Research on Reloading Mechanical Behavior of Ti6321 Titanium Alloy
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School of Materials Science and Engineering, Beijing Institute of Technology

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    摘要:

    對(duì)經(jīng)輕氣炮預(yù)沖擊的Ti6321雙態(tài)組織樣品進(jìn)行準(zhǔn)靜態(tài)壓縮和動(dòng)態(tài)壓縮再加載試驗(yàn),探究沖擊后其力學(xué)性能的變化。利用光學(xué)顯微鏡(OM)和透射電子顯微鏡(TEM)對(duì)其微觀組織演化進(jìn)行觀察并分析。結(jié)果表明,經(jīng)預(yù)沖擊后的Ti6321合金的靜動(dòng)態(tài)屈服強(qiáng)度、平均流變應(yīng)力較原始樣品有所升高,但斷裂應(yīng)變、沖擊吸收功明顯下降,且經(jīng)過預(yù)沖擊的樣品經(jīng)動(dòng)態(tài)再加載后更易出現(xiàn)絕熱剪切破壞。TEM結(jié)果表明,經(jīng)輕氣炮預(yù)沖擊過后的樣品內(nèi)部有孿晶生成,從而導(dǎo)致了Ti6321鈦合金表現(xiàn)出沖擊波強(qiáng)化效應(yīng)。

    Abstract:

    The quasi-static and dynamic reload compression tests were conducted to explore the changes in mechanical properties of Ti6321 alloy bimodal structure after preshock. The optical microscopy (OM) and transmission electron microscopy (TEM) were used to observe and analyze the microstructures. The results show that the static and dynamic yield strength and average flow stress of Ti6321 alloy after pre-shock are higher than those of the original sample, but the fracture strain and impact absorption energy are significantly reduced, and the preshock sample is more likely to appear an adiabatic shear failure after SHPB loading. TEM results showed that twins were formed inside the sample after the preshock of the light gas gun, which caused the Ti6321 titanium alloy to exhibit a shock wave strengthening effect.

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引用本文

周哲,王琳,程興旺,程煥武,徐雪峰,Tayyeb Ali,劉安晉,寧子軒,許玲玉,張斌斌,才鴻年. Ti6321鈦合金再加載力學(xué)行為研究[J].稀有金屬材料與工程,2021,50(2):562~567.[Zhou Zhe, Wang Lin, Cheng Xingwang, Cheng Huanwu, Xu XUefeng, Tayyeb Ali, Liu Anjin, Ning Zixuan, Xu Linyu, Zhang Binbin, Cai Hongnian. Research on Reloading Mechanical Behavior of Ti6321 Titanium Alloy[J]. Rare Metal Materials and Engineering,2021,50(2):562~567.]
DOI：10.12442/j. issn.1002-185X.20200104

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  • 收稿日期:2020-02-20
  • 最后修改日期:2020-07-30
  • 錄用日期:2020-08-04
  • 在線發(fā)布日期: 2021-03-09
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