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冷拉過程中TiNbZr合金的微觀組織和力學(xué)性能
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Microstructure and Mechanical Properties of TiNbZr Alloy during Cold Drawing
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    摘要:

    研究了TiNbZr生物β鈦合金的冷加工性能。TiNbZr合金由真空自耗電弧爐熔煉，實(shí)驗(yàn)過程中采用冷拉變形方式。在冷拉過程中，合金表現(xiàn)出良好的冷加工性能。當(dāng)冷變形率在20%左右時(shí)，出現(xiàn)變形孿晶，使得合金強(qiáng)度有大幅度提高。在隨后的冷變形過程中，位錯(cuò)滑移為主要的塑性變形方式。當(dāng)冷變形率為80%時(shí)，抗拉強(qiáng)度達(dá)到1170 MPa，延伸率也大于10%。在該冷變形率下，晶粒得到顯著細(xì)化，晶粒尺寸在20 nm到50 nm之間。

    Abstract:

    The cold workability of solution-treated TiNbZr biomedical β titanium alloy was investigated. TiNbZr alloy was fabricated by vacuum consumable arc melting furnace. Cold drawing was carried out for further deformation of the studied alloy. During cold drawing, the alloy exhibited excellent workability. Deformation twins appeared when the reduction of cold deformation was around 20%. Dislocations slipping contributed much to plastic deformation in further drawing. The ultimate tensile strength will go up to 1170 MPa and the elongation is larger than 10% when the reduction reaches 80%. Small grains ranging from 20 nm to 50 nm can be obtained when the reduction is 80%.

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王立強(qiáng),楊冠軍,楊華斌,曹繼敏,呂維潔,張 荻.冷拉過程中TiNbZr合金的微觀組織和力學(xué)性能[J].稀有金屬材料與工程,2009,38(4):579~582.[Wang Liqiang, Yang Guanjun, Yang Huabin, Cao Jimin, Lü Weijie, Zhang Di. Microstructure and Mechanical Properties of TiNbZr Alloy during Cold Drawing[J]. Rare Metal Materials and Engineering,2009,38(4):579~582.]
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  • 收稿日期:2008-04-19
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