Effect of shot peening temperature on the microstructure induced by surface severe plastic deformation on an austenitic stainless steel

IF 6.7 2区材料科学 Q1 ENGINEERING, INDUSTRIAL

Journal of Materials Processing Technology Pub Date : 2025-03-23 DOI:10.1016/j.jmatprotec.2025.118823

Yann Austernaud , Marc Novelli , Philippe Bocher , Thierry Grosdidier

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Abstract

The mechanisms of microstructure modifications were investigated for a 316 L austenitic stainless steel subjected to Surface Mechanical Attrition Treatment (SMAT) across a wide temperature range (143 K to 773 K) and their effects on hardness and residual stresses evolutions determined. The research highlights how temperature modulates deformation mechanisms, transitioning from Transformation-Induced Plasticity (TRIP) and Twinning-Induced Plasticity (TWIP) at low temperatures to dislocation glide and dynamic recrystallization at elevated temperatures. These transitions lead to a distinct trade-off: while cryogenic SMAT enhances surface hardness and compressive residual stresses, warm SMAT, particularly at 773 K, facilitates the formation of a thick refined surface layer due to thermal softening effect and increases the deformation and residual stress gradient depth. This study provides new insights into tailoring surface properties through controlled temperature during SMAT, offering pathways to enhance mechanical performance for advanced applications.

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喷丸强化温度对奥氏体不锈钢表面剧烈塑性变形组织的影响

研究了316 L奥氏体不锈钢在较宽温度范围（143 K ~ 773 K）下表面机械磨损处理（SMAT）的微观组织变化机制，并确定了SMAT对硬度和残余应力演变的影响。研究强调了温度如何调节变形机制，从低温下的变形诱导塑性（TRIP）和孪生诱导塑性（TWIP）过渡到高温下的位错滑动和动态再结晶。这些转变导致了明显的权衡：低温SMAT提高了表面硬度和压缩残余应力，而温暖的SMAT，特别是在773 K时，由于热软化效应，有利于形成厚的精细化表面层，并增加变形和残余应力梯度深度。该研究为在SMAT过程中通过控制温度来定制表面特性提供了新的见解，为高级应用提供了提高机械性能的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Materials Processing Technology 工程技术-材料科学：综合

CiteScore

12.60

自引率

4.80%

发文量

403

审稿时长

29 days

期刊介绍： The Journal of Materials Processing Technology covers the processing techniques used in manufacturing components from metals and other materials. The journal aims to publish full research papers of original, significant and rigorous work and so to contribute to increased production efficiency and improved component performance. Areas of interest to the journal include: • Casting, forming and machining • Additive processing and joining technologies • The evolution of material properties under the specific conditions met in manufacturing processes • Surface engineering when it relates specifically to a manufacturing process • Design and behavior of equipment and tools.