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<p>The ultrasonic surface rolling process (USRP) is an advanced surface treatment technology that significantly enhancing surface integrity and mechanical properties. The purpose of this paper is to examine the influence of USRP treatment on the high cycle vibration fatigue (HCVF) behavior of Ti17 titanium alloy blade-like specimens at elevated temperatures. At 450 °C, USRP treatment increases the fatigue strength of Ti17 alloy from 472.15 MPa to 600 MPa, as evidenced by the experimental results. Furthermore, the surface roughness is reduced by 41.3 %, and the maximum surface microhardness and residual stress increase by 20 % and 8.36 times, respectively, with a modified layer depth extending up to 400 µm. Fatigue crack development and propagation can be inhibited by a greater compressive residual stress field and excellent surface quality. This work offers information for additional study and practical applications of USRP in improving the fatigue resistance of titanium alloy components in aerospace engineering.</p>

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Experimental investigation of ultrasonic surface rolling process on Ti17 titanium alloy to improve vibration fatigue limit at elevated temperature

  • 期刊论文

  • 发表日期：

    2025年8月4日

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  • Longhan Zhang,
  • Huayi Cheng,
  • Jiawei Wang,
  • Chengcheng Zhang,
  • Changli Liu,
  • Shuang Liu,
  • Lin Zhu

摘要

The ultrasonic surface rolling process (USRP) is an advanced surface treatment technology that significantly enhancing surface integrity and mechanical properties. The purpose of this paper is to examine the influence of USRP treatment on the high cycle vibration fatigue (HCVF) behavior of Ti17 titanium alloy blade-like specimens at elevated temperatures. At 450 °C, USRP treatment increases the fatigue strength of Ti17 alloy from 472.15 MPa to 600 MPa, as evidenced by the experimental results. Furthermore, the surface roughness is reduced by 41.3 %, and the maximum surface microhardness and residual stress increase by 20 % and 8.36 times, respectively, with a modified layer depth extending up to 400 µm. Fatigue crack development and propagation can be inhibited by a greater compressive residual stress field and excellent surface quality. This work offers information for additional study and practical applications of USRP in improving the fatigue resistance of titanium alloy components in aerospace engineering.