Dislocation Clusters and Microcracks in Thin Films of LCF-Tested Austenitic Steel-Reference-Cited by-同舟云学术

Dislocation Clusters and Microcracks in Thin Films of LCF-Tested Austenitic Steel

Published:2013-09 Issue: Volume:577-578 Page:237-240
ISSN:1662-9795
Container-title:Key Engineering Materials
language:
Short-container-title:KEM

Author:

Eterashvili Tamaz¹,Dzigrashvili T.¹,Vardosanidze M.¹

Affiliation:

1. Georgian Technical University

Abstract

Austenitic chromium-nickel stainless steel CrNiNb 18-10 was studied using TEM technique. Characterizations of thin films prepared from bulk cylindrical samples after low-cycle fatigue (LCF) tests were conducted. Focus was made on the dislocation clusters, slip bands, defects and microstructure changes taking place in the steel during LCF. It is shown that microcracks occur in slip bands. Stereographic and trace analyses revealed the microcrack propagation directions. Two types of microcracks were observed: wedge-shaped and with parallel sides. The obtained results on possible reasons and mechanisms of microcrack formation in the above places are discussed in line with the theoretical assumptions and the existing literature.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Link

https://www.scientific.net/KEM.577-578.237.pdf

Reference10 articles.

1. H. Mughrabi, F. Ackermann and H. Kerz, Persistent slip bands in fatigued face-centered and body-centered cubic metals. Fatigue Mechanisms, ASTM STP, 675: 69–105, (1979).

2. T. Mura, A theory of fatigue crack initiation. Materials Science and Engineering, A176: 61–70, (1994).

3. M.R. Lin, M.E. Fine, T. Mura, Fatigue crack initiation on slip bands: Theory and experiment, Acta Metallurgica,V. 34, Issue 4, Pages 619–628, ( 1986).

4. D. Munz, Work hardening, slip band formation and crack initiation during fatigue of titanium, Engineering Fracture Mechanics, V 5, Issue 2, Pages 353–364, (1973).

5. S. Heino and B. Karlsson, Cyclic deformation and fatigue behavior of 7Mo-0, 5N super austenitic stainless steel- slip characteristics and development of dislocation structures, pp.353-363. Acta Materialia, v. 49 (2), (2001).

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