The strain-induced martensitic transformation in a medical alloy from the ternary Ti–Nb–Mo system was studied. The low-doped Ti_92.5Nb₅Mo_2.5 alloy was produced by arc remelting, followed by annealing, rolling at room temperature, reannealing, and water quenching. X-ray diffraction analysis showed that thermomechanical processing resulted in the alloy primarily consisting of orthorhombic martensite (αʺ) with a small amount of the β-titanium phase. Hysteresis loops were recorded in loading–unloading cycles with 1% strain increments up to a total strain of 4% under compression testing, employing a precision strain gauge. Young’s modulus under loading varied from 51.2 GPa at the initial section to 39.7 GPa after a 2% residual strain. Young’s modulus remains unchanged, within 74.3 GPa, during unloading. Elastic, pseudoelastic, and plastic strains were found to significantly depend on the previous strain within the first three loading–unloading cycles. To examine the impact of higher strains (up to 23.4%) on structural rearrangements and phase transformations, the samples were compressed without a precision strain gauge. X-ray diffraction analysis revealed that only the crystalline texture of the alloy changed after compression. Strains exceeding 23.4% were achieved by rolling at room temperature. After rolling to a strain of 64%, the diffraction patterns indicated an increased amount of the β-phase, as evidenced by the (200) diffraction peak, not observed previously. The increased amount of the β-phase suggests that strain prompted the reverse martensitic transformation (αʺ → β).

研究了三元 Ti-Nb-Mo 系医用合金中的应变诱导马氏体相变。低掺杂Ti _92.5 Nb ₅ Mo _2.5合金通过电弧重熔、退火、室温轧制、再退火和水淬生产。X射线衍射分析表明，热机械加工得到的合金主要由斜方马氏体（αʺ）组成，并含有少量的β-钛相。使用精密应变计，在压缩测试下以 1% 的应变增量记录加载-卸载循环中的磁滞回线，直至总应变达到 4%。负载下的杨氏模量从初始截面的 51.2 GPa 变化到 2% 残余应变后的 39.7 GPa。卸载期间杨氏模量保持不变，在 74.3 GPa 范围内。研究发现，弹性应变、伪弹性应变和塑性应变显着取决于前三个加载-卸载循环中的先前应变。为了检查较高应变（高达 23.4%）对结构重排和相变的影响，在没有精密应变计的情况下压缩样品。X射线衍射分析表明，压缩后只有合金的晶体织构发生了变化。通过在室温下轧制，应变超过 23.4%。轧制至 64% 应变后，衍射图显示 β 相量增加，如 (200) 衍射峰所证明，这是以前未观察到的。β相数量的增加表明应变促进了逆马氏体转变（αʺ → β）。X射线衍射分析表明，压缩后只有合金的晶体织构发生了变化。通过在室温下轧制，应变超过 23.4%。轧制至 64% 应变后，衍射图显示 β 相量增加，如 (200) 衍射峰所证明，这是以前未观察到的。β相数量的增加表明应变促进了逆马氏体转变（αʺ → β）。X射线衍射分析表明，压缩后只有合金的晶体织构发生了变化。通过在室温下轧制，应变超过 23.4%。轧制至 64% 应变后，衍射图显示 β 相量增加，如 (200) 衍射峰所证明，这是以前未观察到的。β相数量的增加表明应变促进了逆马氏体转变（αʺ → β）。