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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:

45

期数:

2026年04

页码:

010-19

栏目:

出版日期:

2026-04-30

文章信息/Info

Title:

Research Progress on the Low-Temperature Properties of Titanium Alloys

作者:

吴聪 韩晴丹 彭丹丹 高羡明 赵永庆

1.陕西科技大学 机电工程学院，陕西 西安 710021 2.西北有色金属研究院，陕西 西安 710016

Author(s):

Wu Conga Han Qingdana Peng Dandana Gao Xianminga Zhao Yongqing

Shaanxi University of Science & Technology College of Mechanical and Electrical Engineering, Xi’an 710021, China Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China

关键词:

钛合金; 低温拉伸; 低温冲击韧性; 变形机制

Keywords:

Titanium alloys;  Low temperature stretching;  low temperature impact toughness;  deformation mechanisms

文献标志码:

A

摘要:

钛合金因其优异的高比强度、耐蚀性、无磁性和良好的低温塑性，可用作液氢储运、深潜装备等低温工况下应用的结构材料。本文系统综述了目前钛合金低温力性能的研究进展。低温拉伸实验表明，TA7、CT20、TC4ELI等合金随试验温度的降低，抗拉强度显著上升，塑性变化不明显。低温下临界分切应力的增加使得位错滑移更难启动，从而强度显著提升；在低温下的较好塑性归因于形变孪生和多系滑移的耦合作用。低温冲击试验研究表明，纯钛在低温下的冲击韧性几乎不变，高密度孪晶是纯钛在低温下冲击韧性仍能与室温持平的根本原因。Ti80、CT20、TC4合金随温度降低冲击韧性呈下降趋势，塑性变形能力的减弱以及较为平直的裂纹扩展路径使得低温下冲击韧性显著下降。最后，对钛合金低温力学性能的研究方向进行展望，需开展高强级别钛合金的低温力学性能研究，并探究增材制造钛合金的低温变形机制和强韧化机理。

Abstract:

Titanium alloy can be used as a structural material for liquid hydrogen storage and transportation, deep submersible equipment and other low temperature conditions due to its excellent high specific strength, corrosion resistance, non-magnetic and good low temperature plasticity. This paper systematically reviews the research progress of low temperature mechanical properties of titanium alloys. The low temperature tensile test shows that the tensile strength of TA7, CT20, TC4ELI and other alloys increases significantly with the decrease of test temperature, and the plasticity does not change significantly. The increase of critical shear stress at low temperature makes dislocation slip more difficult to start, thus the strength is significantly improved. The good plasticity at low temperature is attributed to the coupling effect of deformation twinning and multi-system slip. The low temperature impact test shows that the impact toughness of pure titanium at low temperature is almost unchanged, and the high density twin is the fundamental reason why the impact toughness of pure titanium at low temperature can still maintain the same as that at room temperature. The impact toughness of Ti80, CT20 and TC4 alloys decreases with the decrease of temperature. The weakening of plastic deformation ability and the relatively flat crack propagation path make the impact toughness decrease significantly at low temperature. Finally, the research direction of low-temperature mechanical properties of titanium alloys is prospected, which is necessary to study the low-temperature mechanical properties of high-strength titanium alloys, as well as the low-temperature deformation mechanism and toughening mechanism of additively manufactured titanium alloys.

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更新日期/Last Update: 2026-03-31