Correlations of fatigue strength of additively manufactured metals with hardness and defect size. (September 2022)

• Record Type: Journal Article
• Authors: Derrick, Christopher; Fatemi, Ali
• Is Part Of: International journal of fatigue. Volume 162(2022)
• Publication Date: 2022-09
• Subjects: AM metals -- Hardness -- Internal defects -- Surface roughness -- Fatigue prediction models; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2022.106920
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: Correlations between material properties, and the defect size effects on the fatigue performance of AM metal. Proposed methods or constructing approximate S-N lines. Correlation between fatigue performance of components manufactured of AM metals, and easily and inexpensively obtainable properties. Abstract: One of the principal challenges that limits wide adoption of additively manufactured (AM) metals is their ill-understood fatigue behavior. The present study investigated the correlations between material properties, and the defect size effects on the fatigue performance of AM metal samples. Based on these correlations, some methods are proposed for constructing approximate S-N lines. The goal of these approximation methods is to provide reasonable correlation between the fatigue performance of components manufactured of AM metals, and easily and inexpensively obtainable properties like hardness, ultimate tensile strength, and defect characteristics. The proposed methods are shown to produce reasonable first order approximations.