Effect of shot peening on fatigue behavior and microstructure of additively manufactured Co-Cr-Mo alloy

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Tarih

2023

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John Wiley and Sons Inc

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

This investigation delved into the impact of shot peening on the fatigue properties of Co-Cr-Mo samples manufactured through laser powder bed fusion. Two primary groups were established, one subjected to stress relief heat treatment. Each group underwent further division, with one subgroup undergoing shot peening. Comprehensive microstructural, fractographic analyses and fatigue tests were conducted. Statistical analysis of fatigue results demonstrated a noteworthy difference (p < 0.05) between machined and shot-peened samples across stress levels of 700–70, 600–60, and 500–50 MPa. A statistical significance was observed between machined and heat-treated, then machined samples within 700–70 and 600–60 MPa stress levels. Fatigue analysis of heat-treated, then machined samples revealed a shorter life comparing with machined samples at low cycle fatigue (<105), but superior performance at high cycle fatigue (>105). Fracture surface examinations indicated a planar structure with a distinctive quasi-cleavage texture, affirming that shot peening enhances fatigue behavior by refining mechanical properties. © 2023 The Authors. Fatigue & Fracture of Engineering Materials & Structures published by John Wiley & Sons Ltd.

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Anahtar Kelimeler

Co-Cr-Mo, fatigue, laser powder bed fusion, microstructure, shot peening, Chromium alloys, Cobalt alloys, High-cycle fatigue, Low-cycle fatigue, Molybdenum alloys, Stress relief, Ternary alloys, Textures, Co-cr-mo, Engineering materials, Engineering structures, Fatigue behaviour, Fatigue fracture, Laser powder bed fusion, Laser powders, Powder bed, Shot-peening, Stress levels, Fatigue testing

Kaynak

Fatigue and Fracture of Engineering Materials and Structures

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Q1

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