Scholarlink

<p>Given their exceptional ability to produce long samples with superior mechanical properties, a new group of severe plastic deformation (SPD) methods named hydrostatic SPD require precise investigations. In this context, for the first time, fluid pressure has been applied to the sample during hydrostatic twist extrusion (HTE), as a new SPD technique, to comprehensively explore its plastic deformation characteristics using the finite element method. The results reveal that using fluid to press the sample through the deformation zone makes the processing load independent of sample length. The required load for 50&#xa0;mm and 150&#xa0;mm length sample increases from ~ 4 ton to ~ 31ton in the case of twist extrusion (TE), while this value was 2.42 and 3.2 for HTE, respectively. Additionally, HTE processed samples display a more uniform strain distribution across the cross-section compared to twist extrusion (TE) processed samples. For longer samples suitable for industrial applications, such as a 150&#xa0;mm sample length, HTE applies greater compressive stress with a mean value of approximately 72&#xa0;MPa in the deformation zone, compared to TE, which has a mean compressive pressure of approximately 56&#xa0;MPa, while HTE maintains a processing load that is almost 90% lower than TE.</p> Graphical Abstract <p></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

Hydrostatic twist extrusion: the effects of hydrostatic fluid pressure on deformation characteristics

  • 期刊论文

  • 发表日期：

    2025年6月24日

查看全文
  • E. Taherkhani,
  • M. R. Sabour,
  • M. Khajepour,
  • H. Safahi,
  • A. Jalali Aghchai,
  • M. Baniasadi,
  • G. Faraji

摘要

Given their exceptional ability to produce long samples with superior mechanical properties, a new group of severe plastic deformation (SPD) methods named hydrostatic SPD require precise investigations. In this context, for the first time, fluid pressure has been applied to the sample during hydrostatic twist extrusion (HTE), as a new SPD technique, to comprehensively explore its plastic deformation characteristics using the finite element method. The results reveal that using fluid to press the sample through the deformation zone makes the processing load independent of sample length. The required load for 50 mm and 150 mm length sample increases from ~ 4 ton to ~ 31ton in the case of twist extrusion (TE), while this value was 2.42 and 3.2 for HTE, respectively. Additionally, HTE processed samples display a more uniform strain distribution across the cross-section compared to twist extrusion (TE) processed samples. For longer samples suitable for industrial applications, such as a 150 mm sample length, HTE applies greater compressive stress with a mean value of approximately 72 MPa in the deformation zone, compared to TE, which has a mean compressive pressure of approximately 56 MPa, while HTE maintains a processing load that is almost 90% lower than TE.

Graphical Abstract