Additive manufacturing of fatigue resistant austenitic stainless steels by understanding process-structure–property relationships

Materials Research Letters. 2020;8(1):8-15 DOI 10.1080/21663831.2019.1678202

 

Journal Homepage

Journal Title: Materials Research Letters

ISSN: 2166-3831 (Online)

Publisher: Taylor & Francis Group

LCC Subject Category: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials

Country of publisher: United Kingdom

Language of fulltext: English

Full-text formats available: PDF, HTML

 

AUTHORS

Jonathan W. Pegues (Auburn University)
Michael D. Roach (University of Mississippi Medical Center)
Nima Shamsaei (Auburn University)

EDITORIAL INFORMATION

Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 10 weeks

 

Abstract | Full Text

The limited understanding of additive manufacturing process-structure–property inter-relationships raises some concerns regarding the structural reliability, which limits the adoption of this emerging technology. In this study, laser beam-powder bed fusion is leveraged to fabricate an austenitic stainless steel with a microstructure containing minimal known crack initiation features. Ex-situ microstructural observations of the crack initiation features and mechanisms are carried out for interrupted fatigue tests via electron backscatter diffraction mapping of the micro-cracks. Results show that the additive manufactured stainless steel alloy has improved fatigue resistance compared to its wrought counterpart as a result of the unique microstructural features.