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Continuous and discontinuous crack growth in brass embrittled by liquid gallium

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conference contribution
posted on 06.12.2017, 00:00 by Richard CleggRichard Clegg
The mechanics of liquid metal induced embrittlement (LMIE) are not well understood and this phenomenon is of a high degree of industrial importance. Discontinuous and continuous crack propagation in gallium-embrittled brass was studied using double cantilever beam specimens and crack propagation was found to be discontinuous when the imposed crack speed was less than 6mm/s and was more or less continuous if greater. The threshold K for cracking was found to be non-unique in this system and was weakly dependent on testing variables such as crosshead speed. The discontinuous crack propagation and dependence on crosshead speed were attributed to the tendency of the cracks to blunten by a process of dissolution at the crack tip. A comparison of the experimental results with existing theory suggests that crack growth may not be solely controlled by supply of embrittler to the crack tip.

Funding

Category 3 - Industry and Other Research Income

History

Parent Title

Proceedings of the 20th Australasian Conference on the Mechanics of Structures and Materials : futures in mechanics of structures and materials, 2-5 December 2008, Toowoomba, Australia.

Start Page

367

End Page

372

Number of Pages

6

Start Date

01/01/2009

ISBN-13

9780415491969

Location

Toowoomba, Australia

Publisher

Taylor and Francis

Place of Publication

London, UK

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Institute for Resource Industries and Sustainability (IRIS); Process Engineering and Light Metals;

Era Eligible

Yes

Name of Conference

Australasian Conference on the Mechanics of Structures and Materials