Local fatigue crack propagation behavior of a two-pass friction stir welded aluminum alloy

Fatigue behavior of a two-pass, double-sided, friction stir welded joint was studied to get a basic understanding on the local fatigue crack propagation (FCP) behaviors of the different zones within the weld. The fatigue crack propagation tests were carried out on center notched specimens with initi...

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Autores principales:	Milton MUZVIDZIWA, Masakazu OKAZAKI, Satoshi YAMAGISHI, Masahiro SEINO
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2014
Materias:	friction stir welding microstructure two pass fatigue crack propagation Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/6b68b12956cf48c0883b5dcb432708a6
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spelling	oai:doaj.org-article:6b68b12956cf48c0883b5dcb432708a62021-11-26T06:14:30ZLocal fatigue crack propagation behavior of a two-pass friction stir welded aluminum alloy2187-974510.1299/mej.2014smm0057https://doaj.org/article/6b68b12956cf48c0883b5dcb432708a62014-12-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/1/6/1_2014smm0057/_pdf/-char/enhttps://doaj.org/toc/2187-9745Fatigue behavior of a two-pass, double-sided, friction stir welded joint was studied to get a basic understanding on the local fatigue crack propagation (FCP) behaviors of the different zones within the weld. The fatigue crack propagation tests were carried out on center notched specimens with initial notch positions in the different weld regions and longitudinal to the weld direction. The experimental results demonstrated that the microstructure, as dictated by the thermomechanical history, may play an important role in the fatigue crack propagation within the two-pass friction stir welded joint. The FCP rates were found to be higher in the weld affected zones than in the base metal. Within the weld zones, the heat affected zone and the fine-grained double stirred zone (DSZ) had the highest propagation rates. The effect of the second pass was found to be minimal on the fatigue behavior of the areas outside the stirred zones; however, in the DSZ where the two weld passes overlap, the FCP rates were higher than in the single stirred zones. Furthermore, within the heat affected zones the FCP rates were higher on the retreating side than on the advancing sides of both welds indicating sensitive of the FCP to the tool rotation direction.Milton MUZVIDZIWAMasakazu OKAZAKISatoshi YAMAGISHIMasahiro SEINOThe Japan Society of Mechanical Engineersarticlefriction stir weldingmicrostructuretwo passfatigue crack propagationMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 1, Iss 6, Pp SMM0057-SMM0057 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	friction stir welding microstructure two pass fatigue crack propagation Mechanical engineering and machinery TJ1-1570
spellingShingle	friction stir welding microstructure two pass fatigue crack propagation Mechanical engineering and machinery TJ1-1570 Milton MUZVIDZIWA Masakazu OKAZAKI Satoshi YAMAGISHI Masahiro SEINO Local fatigue crack propagation behavior of a two-pass friction stir welded aluminum alloy
description	Fatigue behavior of a two-pass, double-sided, friction stir welded joint was studied to get a basic understanding on the local fatigue crack propagation (FCP) behaviors of the different zones within the weld. The fatigue crack propagation tests were carried out on center notched specimens with initial notch positions in the different weld regions and longitudinal to the weld direction. The experimental results demonstrated that the microstructure, as dictated by the thermomechanical history, may play an important role in the fatigue crack propagation within the two-pass friction stir welded joint. The FCP rates were found to be higher in the weld affected zones than in the base metal. Within the weld zones, the heat affected zone and the fine-grained double stirred zone (DSZ) had the highest propagation rates. The effect of the second pass was found to be minimal on the fatigue behavior of the areas outside the stirred zones; however, in the DSZ where the two weld passes overlap, the FCP rates were higher than in the single stirred zones. Furthermore, within the heat affected zones the FCP rates were higher on the retreating side than on the advancing sides of both welds indicating sensitive of the FCP to the tool rotation direction.
format	article
author	Milton MUZVIDZIWA Masakazu OKAZAKI Satoshi YAMAGISHI Masahiro SEINO
author_facet	Milton MUZVIDZIWA Masakazu OKAZAKI Satoshi YAMAGISHI Masahiro SEINO
author_sort	Milton MUZVIDZIWA
title	Local fatigue crack propagation behavior of a two-pass friction stir welded aluminum alloy
title_short	Local fatigue crack propagation behavior of a two-pass friction stir welded aluminum alloy
title_full	Local fatigue crack propagation behavior of a two-pass friction stir welded aluminum alloy
title_fullStr	Local fatigue crack propagation behavior of a two-pass friction stir welded aluminum alloy
title_full_unstemmed	Local fatigue crack propagation behavior of a two-pass friction stir welded aluminum alloy
title_sort	local fatigue crack propagation behavior of a two-pass friction stir welded aluminum alloy
publisher	The Japan Society of Mechanical Engineers
publishDate	2014
url	https://doaj.org/article/6b68b12956cf48c0883b5dcb432708a6
work_keys_str_mv	AT miltonmuzvidziwa localfatiguecrackpropagationbehaviorofatwopassfrictionstirweldedaluminumalloy AT masakazuokazaki localfatiguecrackpropagationbehaviorofatwopassfrictionstirweldedaluminumalloy AT satoshiyamagishi localfatiguecrackpropagationbehaviorofatwopassfrictionstirweldedaluminumalloy AT masahiroseino localfatiguecrackpropagationbehaviorofatwopassfrictionstirweldedaluminumalloy
_version_	1718409782400909312

Local fatigue crack propagation behavior of a two-pass friction stir welded aluminum alloy

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