Scholarlink

<p>Thermal damage susceptibility in titanium alloys during abrasive waterjet machining (AWJM) significantly compromises surface integrity. This study systematically investigates the pivotal role of initial β phase content in regulating thermal response and microstructural evolution during AWJM. Through a comparative analysis of Ti-6Al-4&#xa0;V and TC18 alloys, real-time thermal monitoring and multi-scale characterization were employed to reveal distinct thermomechanical behaviours. Results demonstrate that the β-rich TC18 alloy exhibited a 14.11% lower peak temperature than the Ti-6Al-4&#xa0;V alloy. Rapid thermal shock induced dynamic recrystallization, refining the β-grain size by approximately 95% ± 2.4%. Conversely, the subsequent slow cooling regime drove the Ostwald ripening-mediated coarsening of the α-phase. Consequently, TC18 alloy demonstrated superior retention of microhardness, with only an 11.69% ± 0.61% reduction compared to 39.90% ± 0.29% in Ti-6Al-4&#xa0;V alloy, which is attributed to a favourable balance between solid solution and grain boundary strengthening. These findings highlight the crucial role of β phase content in mitigating thermal damage and improving mechanical performance. By enabling low-damage processing that reduces material waste and eliminates energy-intensive secondary finishing steps, this study provides a scientific basis for selecting titanium alloys with optimal β-phase content for high-integrity AWJM, offering a viable pathway toward sustainable, green precision manufacturing.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Beta Phase-Dominated Thermoregulation and Microstructural Evolution During Abrasive Waterjet Machining of Titanium Alloys

  • 期刊论文

  • 发表日期：

    2026年8月3日

查看全文
  • Shuaikang Chang,
  • Wenchuan Liu,
  • Jiren Tang,
  • Mengyan Fan

摘要

Thermal damage susceptibility in titanium alloys during abrasive waterjet machining (AWJM) significantly compromises surface integrity. This study systematically investigates the pivotal role of initial β phase content in regulating thermal response and microstructural evolution during AWJM. Through a comparative analysis of Ti-6Al-4 V and TC18 alloys, real-time thermal monitoring and multi-scale characterization were employed to reveal distinct thermomechanical behaviours. Results demonstrate that the β-rich TC18 alloy exhibited a 14.11% lower peak temperature than the Ti-6Al-4 V alloy. Rapid thermal shock induced dynamic recrystallization, refining the β-grain size by approximately 95% ± 2.4%. Conversely, the subsequent slow cooling regime drove the Ostwald ripening-mediated coarsening of the α-phase. Consequently, TC18 alloy demonstrated superior retention of microhardness, with only an 11.69% ± 0.61% reduction compared to 39.90% ± 0.29% in Ti-6Al-4 V alloy, which is attributed to a favourable balance between solid solution and grain boundary strengthening. These findings highlight the crucial role of β phase content in mitigating thermal damage and improving mechanical performance. By enabling low-damage processing that reduces material waste and eliminates energy-intensive secondary finishing steps, this study provides a scientific basis for selecting titanium alloys with optimal β-phase content for high-integrity AWJM, offering a viable pathway toward sustainable, green precision manufacturing.