skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Dislocation evolution in 316 L stainless steel during multiaxial ratchetting deformation

Abstract

Dislocation patterns and their evolutions in 316 L stainless steel during the multiaxial ratchetting deformation were observed by transmission electron microscopy (TEM). The microscopic observations indicate that the dislocation evolution presented during the multiaxial ratchetting with four kinds of multiaxial loading paths is similar to that in the uniaxial case [G. Z. Kang et al., Mater Sci Eng A 527 (2010) 5952]. That is, dislocation networks and dislocation tangles are formed quickly by the multiple-slip and cross-slip of dislocation activated by applied multiaxial stress; and then polarized patterns such as dislocation walls and elongated incipient dislocation cells are formed at the last stage of multiaxial ratchetting. The dislocation patterns evolve more quickly from the modes at low dislocation density to the ones at high density during the multiaxial ratchetting than that in the uniaxial case, and some traces of multiple-slip are observed in the multiaxial ones. The dislocation evolution during the multiaxial ratchetting deformation is summarized by comparing the observed dislocation patterns with those presented in the multiaxial strain-controlled and symmetrical stress-controlled cyclic tests. The multiaxial ratchetting of 316 L stainless steel can be microscopically and qualitatively explained by the observed evolution of dislocation patterns. - Highlights: Black-Right-Pointing-Pointer Dislocation patternsmore » change from lines and nets to tangles, walls and cells. Black-Right-Pointing-Pointer Dislocation patterns evolve quicker in the multiaxial case. Black-Right-Pointing-Pointer Aligned dislocation arrays and some traces of multiple slips are observed. Black-Right-Pointing-Pointer Heterogeneous dislocation patterns result in the multiaxial ratchetting.« less

Authors:
 [1]; ; ;  [2]
  1. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031 (China)
  2. School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031 (China)
Publication Date:
OSTI Identifier:
22066426
Resource Type:
Journal Article
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 65; Journal Issue: Complete; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-5803
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DEFORMATION; DISLOCATIONS; LOADING; SLIP; STAINLESS STEEL-316L; STRAINS; STRESSES; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Yawei, Dong, Kang Guozheng, E-mail: guozhengkang@yahoo.com.cn, Yujie, Liu, Hong, Wang, and Xiaojuan, Cheng. Dislocation evolution in 316 L stainless steel during multiaxial ratchetting deformation. United States: N. p., 2012. Web. doi:10.1016/J.MATCHAR.2012.01.004.
Yawei, Dong, Kang Guozheng, E-mail: guozhengkang@yahoo.com.cn, Yujie, Liu, Hong, Wang, & Xiaojuan, Cheng. Dislocation evolution in 316 L stainless steel during multiaxial ratchetting deformation. United States. https://doi.org/10.1016/J.MATCHAR.2012.01.004
Yawei, Dong, Kang Guozheng, E-mail: guozhengkang@yahoo.com.cn, Yujie, Liu, Hong, Wang, and Xiaojuan, Cheng. 2012. "Dislocation evolution in 316 L stainless steel during multiaxial ratchetting deformation". United States. https://doi.org/10.1016/J.MATCHAR.2012.01.004.
@article{osti_22066426,
title = {Dislocation evolution in 316 L stainless steel during multiaxial ratchetting deformation},
author = {Yawei, Dong and Kang Guozheng, E-mail: guozhengkang@yahoo.com.cn and Yujie, Liu and Hong, Wang and Xiaojuan, Cheng},
abstractNote = {Dislocation patterns and their evolutions in 316 L stainless steel during the multiaxial ratchetting deformation were observed by transmission electron microscopy (TEM). The microscopic observations indicate that the dislocation evolution presented during the multiaxial ratchetting with four kinds of multiaxial loading paths is similar to that in the uniaxial case [G. Z. Kang et al., Mater Sci Eng A 527 (2010) 5952]. That is, dislocation networks and dislocation tangles are formed quickly by the multiple-slip and cross-slip of dislocation activated by applied multiaxial stress; and then polarized patterns such as dislocation walls and elongated incipient dislocation cells are formed at the last stage of multiaxial ratchetting. The dislocation patterns evolve more quickly from the modes at low dislocation density to the ones at high density during the multiaxial ratchetting than that in the uniaxial case, and some traces of multiple-slip are observed in the multiaxial ones. The dislocation evolution during the multiaxial ratchetting deformation is summarized by comparing the observed dislocation patterns with those presented in the multiaxial strain-controlled and symmetrical stress-controlled cyclic tests. The multiaxial ratchetting of 316 L stainless steel can be microscopically and qualitatively explained by the observed evolution of dislocation patterns. - Highlights: Black-Right-Pointing-Pointer Dislocation patterns change from lines and nets to tangles, walls and cells. Black-Right-Pointing-Pointer Dislocation patterns evolve quicker in the multiaxial case. Black-Right-Pointing-Pointer Aligned dislocation arrays and some traces of multiple slips are observed. Black-Right-Pointing-Pointer Heterogeneous dislocation patterns result in the multiaxial ratchetting.},
doi = {10.1016/J.MATCHAR.2012.01.004},
url = {https://www.osti.gov/biblio/22066426}, journal = {Materials Characterization},
issn = {1044-5803},
number = Complete,
volume = 65,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2012},
month = {Thu Mar 15 00:00:00 EDT 2012}
}