Room temperature creep in amorphous alloys: Influence of initial strain and free volume

Yoo, Byung-Gil; Kim, Kyu-Sik; Oh, Jun-Hak; Ramamurty, U.; Jang, Jae-il

doi:10.1016/j.scriptamat.2010.08.034

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Room temperature creep in amorphous alloys: Influence of initial strain and free volume

Yoo, Byung-Gil;
Kim, Kyu-Sik;
Oh, Jun-Hak;
Ramamurty, U.;
Jang, Jae-il

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WEB OF SCIENCE

67

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SCOPUS

67

초록

The role of imposed strain on the room temperature time-dependent deformation behavior of bulk metallic glasses (BMGs) was systematically investigated through spherical nanoindentation creep experiments. The results show that creep occurred even at very low strains within elastic regimes and, interestingly, a precipitous increase in creep rate was found in plastic regimes, with BMG that had a higher free volume exhibiting greater creep rates. The results are discussed in terms of prevailing mechanisms of elastic/plastic deformation of amorphous alloys. (c) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

키워드

Metallic glasses; Creep; Nanoindentation; Free volume; BULK METALLIC-GLASS; PLASTIC-DEFORMATION; INDENTATION CREEP; AS-CAST; NANOINDENTATION; HARDNESS; FLOW

제목: Room temperature creep in amorphous alloys: Influence of initial strain and free volume

저자: Yoo, Byung-Gil; Kim, Kyu-Sik; Oh, Jun-Hak; Ramamurty, U.; Jang, Jae-il

DOI: 10.1016/j.scriptamat.2010.08.034

발행일: 2010-12

유형: Article

저널명: Scripta Materialia

권: 63

호: 12

페이지: 1205 ~ 1208