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熱軋TB2鈦合金織構(gòu)多晶板動(dòng)態(tài)壓縮性能的各向異性
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中南大學(xué)粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室開(kāi)放基金(2008112047)


Anisotropy of Dynamic Compressive Properties of Textured Polycrystal Sheet of
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    摘要:

    利用Instron 電子拉伸機(jī)和分離式霍普金生壓杠(SHPB)實(shí)驗(yàn)裝置, 研究了準(zhǔn)靜態(tài)和動(dòng)態(tài)壓縮條件下熱軋TB2鈦合金織構(gòu)多晶板的力學(xué)性能。對(duì)TB2鈦合金板材的軋向、橫向以及軋制平面內(nèi)與軋向成45°等3個(gè)方向進(jìn)行了壓縮實(shí)驗(yàn), 得到了不同應(yīng)變速率下的應(yīng)力-應(yīng)變曲線(xiàn)。結(jié)果表明：熱軋TB2鈦合金板材不同方向上的流變應(yīng)力均隨應(yīng)變速率的增加而增加, 表現(xiàn)出明顯的應(yīng)變速率強(qiáng)化效應(yīng)。準(zhǔn)靜態(tài)和動(dòng)態(tài)力學(xué)性能均表現(xiàn)出各向異性, 且準(zhǔn)靜態(tài)和動(dòng)態(tài)壓縮行為規(guī)律不一致?？紤]準(zhǔn)靜態(tài)和動(dòng)態(tài)變形時(shí)可能的塑性變形機(jī)制, 基于微觀(guān)晶體塑性變形理論, 定性討論了熱軋織構(gòu)多晶TB2鈦合金板屈服強(qiáng)度的各向異性

    Abstract:

    The quasistatic and dynamic compressive mechanical properties of textured polycrystal sheet of hot rolled TB2-titanium alloy were investigated by Instron apparatus and Split-Hopkinson pressure bar (SHPB) technology, respectively. Cylindrical specimens of textured titanium alloy sheet, which were cut with the cylinder axis along the rolling direction (RD), transverse direction (TD) and 45o direction (RD-45o) from the rolling direction lying in the rolling plane, were compressed at strain rates in the range of 10-3 to 103 s-1. The compressive stress-strain curves show that the flow stresses for different directions of hot rolled TB2-titanium alloy sheet increase with increase of the strain rate and the obvious effect of strain rate hardening is observed. Both the quasistatic and dynamical compressive mechanical properties exhibit anisotropy. Furthermore, the behavior for quasistatic compression is different from that for dynamical compression. Taking into account of possible mechanisms for quasistatic and dynamic plastic deformation, the mechanical anisotropy of textured polycrystal titanium alloy sheets was discussed based on the microscope crystal plasticity deformation theory

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陳志永,才鴻年,王富恥,譚成文,胡韶華,京方程.熱軋TB2鈦合金織構(gòu)多晶板動(dòng)態(tài)壓縮性能的各向異性[J].稀有金屬材料與工程,2010,39(12):2101~2106.[Chen Zhiyong, Cai Hongnian, Wang Fuchi, Tan Chengwen, Hu Shaohua, Jing Fangcheng. Anisotropy of Dynamic Compressive Properties of Textured Polycrystal Sheet of[J]. Rare Metal Materials and Engineering,2010,39(12):2101~2106.]
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  • 收稿日期:2009-12-25
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