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Effect of friction stir processing on the fatigue performance of AZ31 magnesium alloy

Title	Effect of friction stir processing on the fatigue performance of AZ31 magnesium alloy
Author	Yapıcı, Güney Güven, Sajadifar, S. V., Ghobadlou, Ali Hosseinzadeh, Wegener, T., Sobrero, C., Engelhardt, A., Niendorf, T.
Publication Date:	2023-05
Publication Place	- Wiley
Subject	AZ31 magnesium alloys, Fracture mechanical behavior, Friction stir processing, Microstructure, Very high-cycle fatigue
Type	Periodical
Language	English
Digital	Yes
Manuscript	No
Library:	Özyeğin University
Library Asset ID	1438-1656
Record ID	65071d91-b082-4323-a016-04af01bd0c43
Library Location	Mechanical Engineering
Date	2023-05
Notes	BAGEP Award of the Science Academy, Turkey ; Hessen State Ministry for Higher Education, Research and the Arts, Germany
Sample Text	Herein, the cyclic mechanical behavior of AZ31 magnesium alloy after multipass friction stir processing (FSP) is investigated up to the very high-cycle fatigue (VHCF) regime. The grain refinement and texture evolution after processing are evaluated to enhance the understanding of the fatigue response. Although ultimate tensile strength and ductility of the friction stir processed AZ31 increase up to about 320 MPa and 25%, respectively, the fatigue performance deteriorates in comparison with that of the as-received condition due to the low yield strength and texture evolution after processing. Furthermore, analysis of fracture surfaces of the samples after cyclic loading reveals that the as-received AZ31 is more prone to brittle fracture with multiple-origin fatigue failure even at low stress amplitudes. On the contrary, the dominant failure mechanisms of the friction stir processed samples are initiation and propagation of cracks originating from the surface, porosities, and grain size inhomogeneity. Nevertheless, the capability of FSP for providing superior crack initiation resistance in the VHCF regime is demonstrated as a significant contribution. Based on a detailed study of prevalent microstructural features, processing–property–damage relationships are established indicating the major effect of FSP on the final performance of the AZ31 magnesium alloy.
DOI	10.1002/adem.202201638
Cilt	25

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Özyeğin University

Effect of friction stir processing on the fatigue performance of AZ31 magnesium alloy

Author Yapıcı, Güney Güven, Sajadifar, S. V., Ghobadlou, Ali Hosseinzadeh, Wegener, T., Sobrero, C., Engelhardt, A., Niendorf, T.

Publication Date 2023-05

Publication Place - Wiley

Subject AZ31 magnesium alloys, Fracture mechanical behavior, Friction stir processing, Microstructure, Very high-cycle fatigue

Type Periodical

Language English

Digital Yes

Manuscript No

Library Özyeğin University

Library Asset ID 1438-1656

Record ID 65071d91-b082-4323-a016-04af01bd0c43

Library Location Mechanical Engineering

Date 2023-05

Notes BAGEP Award of the Science Academy, Turkey ; Hessen State Ministry for Higher Education, Research and the Arts, Germany

Sample Text Herein, the cyclic mechanical behavior of AZ31 magnesium alloy after multipass friction stir processing (FSP) is investigated up to the very high-cycle fatigue (VHCF) regime. The grain refinement and texture evolution after processing are evaluated to enhance the understanding of the fatigue response. Although ultimate tensile strength and ductility of the friction stir processed AZ31 increase up to about 320 MPa and 25%, respectively, the fatigue performance deteriorates in comparison with that of the as-received condition due to the low yield strength and texture evolution after processing. Furthermore, analysis of fracture surfaces of the samples after cyclic loading reveals that the as-received AZ31 is more prone to brittle fracture with multiple-origin fatigue failure even at low stress amplitudes. On the contrary, the dominant failure mechanisms of the friction stir processed samples are initiation and propagation of cracks originating from the surface, porosities, and grain size inhomogeneity. Nevertheless, the capability of FSP for providing superior crack initiation resistance in the VHCF regime is demonstrated as a significant contribution. Based on a detailed study of prevalent microstructural features, processing–property–damage relationships are established indicating the major effect of FSP on the final performance of the AZ31 magnesium alloy.

DOI 10.1002/adem.202201638

Cilt 25