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工業(yè)純鈦動(dòng)態(tài)壓縮特性及破壞的實(shí)驗(yàn)研究
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寧波大學(xué)

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O347.3

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國(guó)家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）;國(guó)家教育部博士點(diǎn)基金


Experimental Study on Mechanical Properties and Failure characteristic of a Commercially Pure Titanium under Dynamic Compression
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Ningbo University

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    摘要:

    本文利用分離式霍普金森壓桿對(duì)工業(yè)純TA2進(jìn)行了動(dòng)態(tài)壓縮及絕熱剪切破壞進(jìn)行了實(shí)驗(yàn)研究，得到不同應(yīng)變率和溫度下的宏觀應(yīng)力-應(yīng)變關(guān)系曲線。通過(guò)對(duì)壓縮本構(gòu)特性及微觀金相破壞的比較分析，討論了加載率、表觀壓縮本構(gòu)特性對(duì)絕熱剪切形成的影響，結(jié)果顯示：Ta2試樣動(dòng)態(tài)壓縮呈現(xiàn)絕熱剪切破壞特征，絕熱剪切帶在空間呈對(duì)稱的雙錐形狀；隨加載率提高，絕熱剪切帶形成的臨界應(yīng)變?cè)叫。环治霰砻鲃?dòng)態(tài)壓縮實(shí)驗(yàn)無(wú)法得到關(guān)于絕熱剪切起始、發(fā)展過(guò)程的本構(gòu)軟化信息。

    Abstract:

    Pure titanium TA2 alloy was tested by Split Hopkinson Pressure Bar (SHPB) under uniaxial dynamic compression conditions with different strain rates and room temperatures. Adiabatic shear bands were found in the specimens by metallographic after compression tests. As a result, we found strain and strain rate were so important for the initiation of shear bands. A critical strain must be arrived when the shear bands occur, and the larger strain rate, the smaller critical strain.

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付應(yīng)乾,董新龍.工業(yè)純鈦動(dòng)態(tài)壓縮特性及破壞的實(shí)驗(yàn)研究[J].稀有金屬材料與工程,2016,45(1):102~106.[Fu Yingqian, Dong Xinlong. Experimental Study on Mechanical Properties and Failure characteristic of a Commercially Pure Titanium under Dynamic Compression[J]. Rare Metal Materials and Engineering,2016,45(1):102~106.]
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  • 收稿日期:2014-01-30
  • 最后修改日期:2014-03-11
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  • 在線發(fā)布日期: 2019-01-04
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