Cover Image

Mode I fatigue crack growth induced by strain-aging in precipitation-hardened aluminum alloys

In this study, the effects of Mg on the fatigue crack growth (FCG) characteristics of precipitation-hardened Al6061 alloys containing Zr and excess Mg are examined. The growth behavior of microstructurally large cracks is investigated via rotating-bending fatigue tests conducted at room temperature....

Full description

Saved in:
Bibliographic Details
Main Authors: Anis, Samsol Faizal, Koyama, Motomichi, Hamada, Shigeru, Noguchi, Hiroshi
Format: Article
Published: Elsevier Ltd. 2019
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/id/eprint/87895/
http://dx.doi.org/10.1016/j.tafmec.2019.102340
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.utm.87895
record_format eprints
spelling my.utm.878952020-11-30T13:36:38Z http://eprints.utm.my/id/eprint/87895/ Mode I fatigue crack growth induced by strain-aging in precipitation-hardened aluminum alloys Anis, Samsol Faizal Koyama, Motomichi Hamada, Shigeru Noguchi, Hiroshi TJ Mechanical engineering and machinery In this study, the effects of Mg on the fatigue crack growth (FCG) characteristics of precipitation-hardened Al6061 alloys containing Zr and excess Mg are examined. The growth behavior of microstructurally large cracks is investigated via rotating-bending fatigue tests conducted at room temperature. Analyses of the crack propagation and striation features show that excess Mg promotes the occurrence of Mode I fatigue cracks. These facts suggest that dynamic strain aging due to Mg restricts dislocations motion, resulting in greater work hardening, and generates a large number of active slip systems, leading to more non-localized slip and a large area of striation formation. Consequently, it is concluded that this phenomenon induces highly stable crack growth in Al alloys with excess Mg, which influences the fatigue crack growth rate (FCGR) scatter of microstructurally large cracks. A reasonable mechanism of strain-aging-induced Mode I FCG in Al alloys is proposed on the basis of the morphological aspects of fatigue striation formation. Elsevier Ltd. 2019-12 Article PeerReviewed Anis, Samsol Faizal and Koyama, Motomichi and Hamada, Shigeru and Noguchi, Hiroshi (2019) Mode I fatigue crack growth induced by strain-aging in precipitation-hardened aluminum alloys. Theoretical and Applied Fracture Mechanics, 104 . p. 102340. ISSN 0167-8442 http://dx.doi.org/10.1016/j.tafmec.2019.102340
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Anis, Samsol Faizal
Koyama, Motomichi
Hamada, Shigeru
Noguchi, Hiroshi
Mode I fatigue crack growth induced by strain-aging in precipitation-hardened aluminum alloys
description In this study, the effects of Mg on the fatigue crack growth (FCG) characteristics of precipitation-hardened Al6061 alloys containing Zr and excess Mg are examined. The growth behavior of microstructurally large cracks is investigated via rotating-bending fatigue tests conducted at room temperature. Analyses of the crack propagation and striation features show that excess Mg promotes the occurrence of Mode I fatigue cracks. These facts suggest that dynamic strain aging due to Mg restricts dislocations motion, resulting in greater work hardening, and generates a large number of active slip systems, leading to more non-localized slip and a large area of striation formation. Consequently, it is concluded that this phenomenon induces highly stable crack growth in Al alloys with excess Mg, which influences the fatigue crack growth rate (FCGR) scatter of microstructurally large cracks. A reasonable mechanism of strain-aging-induced Mode I FCG in Al alloys is proposed on the basis of the morphological aspects of fatigue striation formation.
format Article
author Anis, Samsol Faizal
Koyama, Motomichi
Hamada, Shigeru
Noguchi, Hiroshi
author_facet Anis, Samsol Faizal
Koyama, Motomichi
Hamada, Shigeru
Noguchi, Hiroshi
author_sort Anis, Samsol Faizal
title Mode I fatigue crack growth induced by strain-aging in precipitation-hardened aluminum alloys
title_short Mode I fatigue crack growth induced by strain-aging in precipitation-hardened aluminum alloys
title_full Mode I fatigue crack growth induced by strain-aging in precipitation-hardened aluminum alloys
title_fullStr Mode I fatigue crack growth induced by strain-aging in precipitation-hardened aluminum alloys
title_full_unstemmed Mode I fatigue crack growth induced by strain-aging in precipitation-hardened aluminum alloys
title_sort mode i fatigue crack growth induced by strain-aging in precipitation-hardened aluminum alloys
publisher Elsevier Ltd.
publishDate 2019
url http://eprints.utm.my/id/eprint/87895/
http://dx.doi.org/10.1016/j.tafmec.2019.102340
_version_ 1685579005605969920
score 13.211869

Similar Items