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TiNbTaZr鈦合金的組織演變及彈性行為
發(fā)布人：上海艾荔艾金屬材料有限公司www.jshcn.cn
更新時間：2015-08-27
研究Ti35Nb2Ta3Zr0.3O合金在冷變形過程的組織結(jié)構(gòu)及彈性行為。
TiNbTaZr鈦合金的組織演變及彈性行為Microstructure evolution and elastic behaviors of TiNbTaZr
titanium alloy
研究Ti35Nb2Ta3Zr0.3O合金在冷變形過程的組織結(jié)構(gòu)及彈性行為。結(jié)果表明：隨著冷變形的進行，合金的顯微組織交織更加劇烈，并出現(xiàn)與旋鍛軸向平行的á110？絲織構(gòu)，使該方向的彈性模量下降；冷變形合金無應(yīng)力誘發(fā)α"馬氏體產(chǎn)生，β相具有較強的穩(wěn)定性，無偽彈性變形特征；隨冷變形量的增加，合金衍射峰變寬，亞晶數(shù)量增多，缺陷密度增大，也致使彈性模量下降；強冷變形合金在拉伸過程不斷產(chǎn)生孿晶，缺陷密度持續(xù)增大，導(dǎo)致合金的非線彈性特征。
The microstructure and elastic behaviors of
Ti35Nb2Ta3Zr0.3O alloy during cold working were investigated. The results show
that the microstructure is highly distorted, and the á110？ texture along the
swaging axis is produced with the cold working, which results in the decrease in
the elastic modulus along the direction. Stress-induced α"-phase is not
observed, β phase is of strong stability in cold worked alloy, and no
pseudo-elastic deformation occurs. With the increase of cold deformation rate,
the diffraction peak broadens, the number of subgrains increases, the defect
density increases accordingly, and the elastic modulus decreases. Twins are
generated constantly, and defect density increases in severely worked alloy
during the tensile test, which results in non-linear elasticity characteristics
of the alloy.