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采用X射线衍射仪、光学显微镜、力学性能测试系统及电化学工作站等研究了Mo添加对TiZrMo合金的相结构、微观组织、力学性能及腐蚀行为的影响规律。结果表明：TZ0M合金主要由α相组成；添加Mo元素后，TZx M合金的相组成发生了明显的变化，随着Mo元素含量的增加，发生了α→α′→α′+β的相变过程。TZ0M合金由板条状α相和片状α相组成，平均宽度约为4.35μm，同时部分板条状α相呈现出等轴化趋势；当添加Mo元素后，合金出现明显的β晶界，并且在β晶粒内部存在相互交错的针状α′马氏体相。此外，随着Mo含量的增加，合金的压缩屈服强度和显微硬度逐渐增大，当Mo质量分数为3%时，TZ3M合金的屈服强度和显微硬度分别为845 MPa和326 HV0.2。电化学测试结果显示，当Mo质量分数为2%时，在质量分数为3.5%的NaCl溶液中的腐蚀电流密度icorr、维钝电流密度ip和极化电阻Rp分别为32.86 nA/cm2、77.83 nA/cm2和1 750.48 kΩ·cm2，表明TZ2M合金具有良好的耐腐蚀性能。
Abstract：The effect of Mo addition on the microstructure, phase composition, mechanical properties and electrochemical properties of TiZrMo alloys was studied by means of X-ray diffraction(XRD), optical microscope(OM), mechanical properties testing system and an electrochemical workstation. Results indicate that the Mo addition(0～3 mass%) fundamentally restructure Ti Zrx Mo alloys, driving a sequential phase transformation from α→α′→α′+β. XRD and OM analyses reveal the Mo-free alloy(TZ0M) consists of lamellar α-phase(avg. width: 4.35 μm), while partial lamellars exhibit equiaxing tendency. With Mo addition, distinct β-grain boundaries appear, and interlaced, acicular-shaped α′-martensites are observed within the β grains. Compressive yield strength and microhardness exhibits monotonically enhancement with increasing Mo content, reaching maxima of 845 MPa and 326 HV0.2 for TZ3M(3 mass% Mo). Electrochemical testing identified 2 mass% Mo as optimal for corrosion resistance, demonstrating minimal corrosion current density(32.86 nA/cm2), passive current density(77.83 nA/cm2), and maximal polarization resistance(1750.48 kΩ·cm2) in 3.5% NaCl solution.
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基本信息:
中图分类号:TG146.23
引用信息:
[1]徐文燕,景然,张晴,等.Mo元素对TiZr合金微观组织、力学性能及腐蚀行为的影响[J].陕西理工大学学报(自然科学版)().
基金信息:
陕西省自然科学基础研究计划项目（2024JC-YBMS-355,2024JC-YBMS-292）; 陕西省青年创新团队项目（24JP036）
2026-04-24
2026-04-24
2026-04-24