@inproceedings{26f6b9682e5e4bd0884fe5b9ed814b69,
title = "Mechanical properties and microstructural characterization of a multilayered multipass friction stir weld in steel",
abstract = "Multilayered multipass friction stir welding (MM-FSW) makes it possible to use FSW to fabricate thick-section structures. In this work, MM-FSW was demonstrated on a high strength low alloy steel; ASTM A572 Grade 50. Three steel plates with thicknesses of 0.18'', 0.18'', 0.24'' respectively were stacked and friction stir welded together to form a 0.6'' thick welded structure. The welded plate was sectioned into rectangular bars transverse to the weld direction for tensile testing to evaluate mechanical properties. Digital image correlation (DIC) was employed to map the local strain fields during tensile testing. The initial failure was found to occur simultaneously at the bottom and middle layers away from the weld zone. The top layer failed last in the base metal. The failure locations were consistent among different samples tested. Also, Charpy V-notch impact tests were conducted for weld metal, heat affected zone, and the base metal at each layer as a function of temperature. The weld microstructures were characterized using optical and electron microscopy and micro-hardness mapping.",
keywords = "Friction stir weld, High strength low alloy steel, Mechanical properties, Multilayer",
author = "Lim, {Yong Chae} and Samuel Sanderson and Murray Mahoney and Dongxiao Qiao and Yanli Wang and Wei Zhang and Zhili Feng",
year = "2013",
doi = "10.1002/9781118658345.ch9",
language = "English",
isbn = "9781118605783",
series = "TMS Annual Meeting",
publisher = "Minerals, Metals and Materials Society",
pages = "81--90",
booktitle = "Friction Stir Welding and Processing VII - Held During the TMS 2013 Annual Meeting and Exhibition",
note = "Friction Stir Welding and Processing VII - TMS 2013 Annual Meeting and Exhibition ; Conference date: 03-03-2013 Through 07-03-2013",
}