The effect of infiltration induced crack closure on crack growth retardation

Journal Article · Mon Nov 14 23:00:00 EST 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90107-4· OSTI ID:7183348

Sheu, B C; Song, P S ^[1]; Shin, C S ^[2]

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1. Chung Cheng Inst. of Tech., Taoyuan (Taiwan, Province of China)
2. National Taiwan Univ., Taipei (Taiwan, Province of China)

It is now well known that extra materials on the flanks of a fatigue crack will cause premature crack closure and a reduction in crack growth rate. These extra materials may be residual plastic wake, corrosion/oxidation products, phase transformation and fluid. Micro-roughness of the fatigue fracture surface is also capable of bringing about premature crack closure. The phenomenon of crack growth retardation following a single tensile overload has been attributed to some of these crack closure mechanisms. Considerable amount of research has been carried out on the mechanisms and effects of naturally occurring crack closure on fatigue crack growth. By contrast, relatively little attention has been given to artificially induced crack closure. Recently, it has been noted that artificially created crack closure may lead to the development of practical fatigue crack repair methods. This work presents the preliminary results on the effects of using alumina powder reinforced epoxy resin infiltration to induce crack closure.

• OSTI ID: 7183348
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 31:10; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

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36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
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CRACK PROPAGATION
CRACKS
FRACTURE MECHANICS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
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STAINLESS STEEL-304
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