Microstructural and geometrical size effects on the fatigue of metallic materials. (15th March 2022)

• Record Type: Journal Article
• Authors: Zheng, Zebang; Zhan, Mei; Fu, M.W.
• Is Part Of: International journal of mechanical sciences. Volume 218(2022)
• Publication Date: 2022-03-15
• Subjects: Microstructural size effect -- Geometrical size effect -- Fatigue behaviors and performances -- Fatigue mechanism -- Fatigue modeling -- Fatigue life prolongation; Mechanical engineering -- Periodicals; Génie mécanique -- Périodiques; Mechanical engineering; Maschinenbau; Mechanik; Zeitschrift; Periodicals; 621.05
• DOI: 10.1016/j.ijmecsci.2021.107058
• Languages: English
• ISSNs: 0020-7403

Abstract

Highlights: Both microstructural and geometrical size effects (SEs) strongly affect fatigue life. More advanced in-situ fatigue methods are still needed. Geometrical SE affects fatigue performance accompanied by statistical information of the defects. Microstructural scale features play different roles in LCF, LCDF and HCF/VHCF. Fatigue prediction methods incorporating SE with high accuracy and fast-speed calculation need to be developed. Abstract: It has been widely recognized that the fatigue performance of metallic materials is significantly affected by both geometrical and microstructural sizes. Based on a literature review of the recent development of the size effects (SEs) on fatigue, this paper presents a panorama of the correlation of SEs with low-cycle fatigue, low-cycle dwell fatigue, high-cycle fatigue and very-high-cycle fatigue, respectively. The experimental and numerical methods to investigate SEs and their advances and limitations are critically presented. Finally, the research gap, key challenges and prospects ahead are discussed. Graphical abstract: Image, graphical abstract