WFRF:(Wang Qingyuan)
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On fatigue crack origin with a fine granular area in matrix without defect
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- Chai, Guocai (author)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten,Alleima AB, Sweden
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- Siriki, Raveendra (author)
- Alleima AB, Sweden
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- Wang, Qingyuan (author)
- Chengdu Univ, Peoples R China
- (creator_code:org_t)
- 2024
- 2024
- English.
- In: Materialia. - : ELSEVIER SCI LTD. - 2589-1529. ; 33
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Fatigue crack initiation in metallic materials during very high cycle fatigue has been characterized by a subsurface crack origin with defect such as an inclusion. In this paper, fatigue damage behavior in an austenitic stainless steel has been studied using a novel progressive stepwise load increasing test method with each cycle step higher than 108 cycles. Subsurface crack origin with a fine granular area has formed in the matrix without defect. This is a new phenomenon. The mechanism has been investigated using Focused Ion Beam crosssectioning and electron channeling contrast imaging techniques. Strain localization, grain fragmentation and local plasticity exhaustion are the main factors that cause fatigue damage and crack initiation in the matrix. This study provides a fundamental understanding how material damage and crack initiation occur in material matrix during very high cycle fatigue.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
Keyword
- Very high cycle fatigue; Fatigue crack origin; Dislocation; Austenitic steels; Grain boundary
Publication and Content Type
- ref (subject category)
- art (subject category)
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