PSI - Issue 36

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 36 (2022) 153–158

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the conference Guest Editors Abstract This paper describes the basic low cycle fatigue properties of AZ31 friction stir welded joints obtained by different welding velocities: 150, 300, 600, and 900 mm/min with the constant value of 1600 rpm tool rotation speed. The performed LCF tests at various strain amplitudes: 0.25, 0.35, 0.5 (for R=-1) together with fractography analysis allowed to state that the value of welding velocity has no significant impact on the LCF behavior of AZ31 FSW in the investigated range. The tests also revealed that the AZ31 FSW joint is characterized by three stages of fatigue life: a very short period of cyclic hardening (up to 100 cycles), cyclic stabilization, and a relatively long period of cyclic softening until failure. All joints are free of imperfections and tend to fail in the heat-affected zones. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the conference Guest Editors Keywords: magnesium; friction stir welding; mechanical properties; fatigue; fractography 1. Introduction Friction stir welding (FSW) becomes more and more popular as a welding process of light alloys due to a series of benefits which provide: very high joint efficiency, fine-grain microstructure, low energy consumption, and others Y-NC-ND license (https:/ 1st Virtual International Conference “In service Damage of Materials: Diagnostics and Prediction” The influence of tool traverse speed on the low cycle fatigue properties of AZ31 friction stir welded joints Robert Kosturek* , Janusz Mierzyński, Marcin Wachowski, Janusz Torzewski, Lucjan Śnieżek Military University of Technology, Faculty of Mechancial Enginnering, Department of Fatigue and Machine Desing, 2 gen. S. Kaliskiego str., 00-908 Warsaw, Poland

* Corresponding author. Tel.: +48 261 839 245 E-mail address: robert.kosturek@wat.edu.pl

2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the conference Guest Editors

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the conference Guest Editors 10.1016/j.prostr.2022.01.017