Mechanisms of serrated flow in aluminium alloys with precipitates investigated by acoustic emission

Journal Article · Fri Jul 24 04:00:00 UTC 1998 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(98)00070-6· OSTI ID:634678

Cemelik, F; Balik, J; Pesicka, J; Lukac, P ^[1]; Pink, E ^[2]; Krol, J ^[3]

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1. Charles Univ., Prague (Czech Republic). Dept. of Metal Physics
2. Austrian Academy of Sciences, Leoben (Austria). Erich-Schmid-Inst. of Materials Science
3. Polish Academy of Sciences, Cracow (Poland). Aleksander-Krupkowski-Inst. of Metallurgy and Materials Science

By measuring the acoustic emission, it is possible to distinguish between deformation which is controlled by normal dislocation motion through a crystal lattice, and deformation controlled by the shearing of coherent particles. These results from alloys with different precipitate structures can be correlated with the appearance of serrated flow; when shearing is pronounced, serrated flow is minute. The claim that shearing is directly responsible for serrated flow is not supported by these findings.

• OSTI ID: 634678
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 12 Vol. 46; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACOUSTIC EMISSION TESTING
ALUMINIUM BASE ALLOYS
DEFORMATION
DISLOCATIONS
MICROSTRUCTURE
PRECIPITATION