Development of Micro-shear Fatigue Test and its Application to Single Crystal of Pure Iron. (2016)

• Record Type: Journal Article
• Authors: Hayakawa, M.; Nakayama, E.; Okamura, K.; Yamamoto, M.; Shizawa, K.
• Is Part Of: Procedia engineering. Volume 160(2016)
• Page Start: 167
• Page End: 174
• Publication Date: 2016
• Subjects: Multiaxial fatigue -- Shear fatigue strength -- Slip plane -- Single-crystal iron -- Small specimen; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2016.08.877
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: In this study, a new fatigue testing method under shear and axial loading was developed for small specimens (3mm long and 0.3mm thick). The method was applied to a single crystal of pure iron and extra-low carbon steel in order to investigate the effect of shear and normal stress on cyclic slip activity. The specimen was sufficiently small to be prepared from a single crystal, aiming at a specific slip system in the shear loading direction. Moreover, the specimen had a single edge notch, which was designed to generate both pure shear stress and normal stress. Using this testing method, shear fatigue strength with a static normal stress on the slip system [111] was evaluated, and the fatigue strength was compared with that of polycrystalline ferrite steel with static axial loading.