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Fatigue behavior of friction stir welded joints of pure copper with ultra-fine grains

Title	Fatigue behavior of friction stir welded joints of pure copper with ultra-fine grains
Author	Salahi, Salar, Yapıcı, Güney Güven
Publication Date:	2015
Publication Place	- Elsevier
Subject	Friction stir welding, Pure copper, Low cycle fatigue, Cyclic response
Type	Document
Language	English
Digital	Yes
Manuscript	No
Library:	Özyeğin University
Library Asset ID	2211-8128
Record ID	dcab5b95-6eac-4a29-8d2f-63faa7c4d141
Library Location	Mechanical Engineering
Date	2015
Notes	Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Sample Text	In order to determine the long term durability of friction stir welded joints with ultra-fine grained microstructure, investigation of the mechanical response with specific emphasis on fatigue behaviour is critical. In this paper, fatigue behavior of friction stir welded joints of pure copper in low cycle; strain-controlled regime was investigated. Microstructural characterizations indicated the formation of recrystallized ultrafine-grained microstructure in the nugget zone (NZ) after friction stir welding. Fatigue properties were specified at a strain ratio of 0.1 with total strain amplitudes of 0.01, 0.1, and 0.2%. The results attained from the experiments demonstrated cyclic hardening effect at high strain amplitudes, while softening was observed in low strain amplitude of 0.01%. The hysteresis loops indicated the concavity along with the small portion of linear behavior after the reversal point. Localized deformation in the form of shear bands along with equiaxed cells and noticeable misorientation were observed on the fracture surface.
Cilt	11

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Fatigue behavior of friction stir welded joints of pure copper with ultra-fine grains

Author Salahi, Salar, Yapıcı, Güney Güven

Publication Date 2015

Publication Place - Elsevier

Subject Friction stir welding, Pure copper, Low cycle fatigue, Cyclic response

Type Document

Language English

Digital Yes

Manuscript No

Library Özyeğin University

Library Asset ID 2211-8128

Record ID dcab5b95-6eac-4a29-8d2f-63faa7c4d141

Library Location Mechanical Engineering

Date 2015

Notes Due to copyright restrictions, the access to the full text of this article is only available via subscription.

Sample Text In order to determine the long term durability of friction stir welded joints with ultra-fine grained microstructure, investigation of the mechanical response with specific emphasis on fatigue behaviour is critical. In this paper, fatigue behavior of friction stir welded joints of pure copper in low cycle; strain-controlled regime was investigated. Microstructural characterizations indicated the formation of recrystallized ultrafine-grained microstructure in the nugget zone (NZ) after friction stir welding. Fatigue properties were specified at a strain ratio of 0.1 with total strain amplitudes of 0.01, 0.1, and 0.2%. The results attained from the experiments demonstrated cyclic hardening effect at high strain amplitudes, while softening was observed in low strain amplitude of 0.01%. The hysteresis loops indicated the concavity along with the small portion of linear behavior after the reversal point. Localized deformation in the form of shear bands along with equiaxed cells and noticeable misorientation were observed on the fracture surface.

Cilt 11