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contributor authorZhao, P. C.
contributor authorHu, Y. T.
contributor authorWang, L. L.
contributor authorLiu, Z. W.
date accessioned2022-02-04T14:37:48Z
date available2022-02-04T14:37:48Z
date copyright2020/04/28/
date issued2020
identifier issn0094-4289
identifier othermats_142_4_041002.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4274060
description abstractThe plastic deformation during flash-butt welding (FBW) and its effects on weld quality are investigated by using numerical and experimental methods. The electro-thermo-mechanical coupling model of FBW is validated by comparing the calculated temperature and plastic deformation to measured one, obtaining reasonable agreement. The calculation results reveal that a thin liquid metal film forms at the contact interface during accelerating flash stage to provide temperature conditions for upsetting. The length of liquid metal (including burning and expelled losses) is 29.7 mm for one piece pipeline tube under the given condition. The stress and strain at contact surface are both almost zero at the initial stage of upsetting due to the thin liquid metal film existing at the contact interface, and they rapidly increase to 58.0 MPa and 17.7, respectively, while the liquid metal are excluded from the contact interface between two tubes to be welded. The maximum plastic deformation is 18.1 mm at the given condition under the action of upsetting force. The experimental results illustrate that the microstructure of X65 FBW joints consists of massive ferrite, grain boundary pre-eutectic ferrite, pearlite, and widmannstatten, while the microstructure in heat-affected zone is fine ferrite and pearlite. The coarse grain size and gray spots in the butt joint severely decrease the tension strength and impact toughness.
publisherThe American Society of Mechanical Engineers (ASME)
titleNumerical and Experimental Study of Plastic Deformation During Flash Butt Welding of X65 Pipeline Steel
typeJournal Paper
journal volume142
journal issue4
journal titleJournal of Engineering Materials and Technology
identifier doi10.1115/1.4046850
page41002
treeJournal of Engineering Materials and Technology:;2020:;volume( 142 ):;issue: 004
contenttypeFulltext


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