Severe shot peening: A promising solution for mitigating stress corrosion cracking in solution-annealed LPBF 316 l stainless steel

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2024-10-28 DOI:10.1016/j.matlet.2024.137626

Tejas Gundgire , Suvi Santa-aho , Timo Rautio , Minnamari Vippola

引用次数: 0

Abstract

Laser powder bed fusion (LPBF) effectively fabricates intricate 316L stainless steel components but often results in significant tensile residual stresses and anisotropic microstructures, compromising mechanical performance. Solution annealing at 1050–1100 °C reduces anisotropy along with mitigating these stresses but may reduce stress corrosion cracking resistance (SCC). Therefore, this study combined solution annealing with severe shot peening (SSP) to enhance the surface properties and the SCC performance. The results showed that SSP introduced compressive residual stresses exceeding −700 MPa on the surface and up to 300 µm in depth, significantly reducing tensile stresses. Additionally, SSP increased surface hardness and halved surface roughness, potentially enhancing stress corrosion cracking resistance and mechanical performance, establishing SSP as an effective post-processing technique for LPBF 316L components.

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强化喷丸：减轻固溶退火 LPBF 316 l 不锈钢应力腐蚀开裂的可行解决方案

激光粉末熔床（LPBF）可有效制造复杂的 316L 不锈钢部件，但往往会产生显著的拉伸残余应力和各向异性微结构，从而影响机械性能。在 1050-1100 °C 温度下进行固溶退火可降低各向异性并减轻这些应力，但可能会降低抗应力腐蚀开裂（SCC）能力。因此，本研究将固溶退火与严重喷丸强化（SSP）相结合，以提高表面性能和 SCC 性能。结果表明，SSP 在表面产生的压残余应力超过 -700 兆帕，深度可达 300 微米，显著降低了拉应力。此外，SSP 还提高了表面硬度，使表面粗糙度减半，从而增强了抗应力腐蚀开裂能力和机械性能，使 SSP 成为 LPBF 316L 部件的一种有效后处理技术。

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

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive