An analysis of the influence of heat treatments and surface finishing conditions on the high cycle fatigue behaviour of W360 hot work tool steel produced by Powder Bed Fusion – Laser Beam

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A Pub Date : 2025-03-19 DOI:10.1016/j.msea.2025.148237

M. Zanni, G. Di Egidio, L. Tonelli, A. Morri, L. Ceschini

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引用次数: 0

Abstract

High-cycle fatigue behaviour of W360 steel produced by Powder Bed Fusion – Laser Beam (PBF-LB) is explored by comparing post-processing of industrial interest, involving both heat treatments (conventional quenching and multiple tempering (CHT), or innovative high-pressure heat treatment (HPHT)) and surface finishing (sandblasting, machining, shot peening). The combination of HPHT and machining returns the highest fatigue strength (767 ± 10 MPa) by reason of: i) reduced number and size of process-related defects compared to CHT and machining (457 ± 19 MPa); ii) reduced surface roughness compared to HPHT and sandblasting (243 ± 23 MPa) and HPHT and shot-peening (403 ± 19 MPa). The latter combination, however, shows an improved fatigue strength than the sandblasted one, thanks to compressive residual stress in the superficial region. The correlation between killer defect and fatigue performance is also discussed based on the Kitagawa-Takahashi diagram and the El-Haddad model, and compared to the conventionally manufactured steel.

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.