Elastic modulus, hardness and creep performance of SnBi alloys using nanoindentation

A series of SnBi alloys with Bi concentration ranging from 3% to 70% have been studied by nanoindentation technique at room temperature. Constant strain rate (CSR) method was used to evaluate the elastic modulus, hardness and the creep stress exponent of the alloys. SnBi solid solutions with Bi conc...

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Main Authors: Shen, Lu, Septiwerdani, Pradita, Chen, Zhong
其他作者: School of Materials Science & Engineering
格式: Article
語言:English
出版: 2013
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在線閱讀:https://hdl.handle.net/10356/97815
http://hdl.handle.net/10220/11161
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機構: Nanyang Technological University
語言: English
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spelling sg-ntu-dr.10356-978152020-06-01T10:01:54Z Elastic modulus, hardness and creep performance of SnBi alloys using nanoindentation Shen, Lu Septiwerdani, Pradita Chen, Zhong School of Materials Science & Engineering DRNTU::Engineering::Materials A series of SnBi alloys with Bi concentration ranging from 3% to 70% have been studied by nanoindentation technique at room temperature. Constant strain rate (CSR) method was used to evaluate the elastic modulus, hardness and the creep stress exponent of the alloys. SnBi solid solutions with Bi concentration up to 10 wt% show significantly higher modulus and hardness than pure Sn. Small amount of Bi precipitates inside Sn-rich phase effectively enhance the hardness and creep resistance of the alloy; while such distribution of Bi particles has no effect on the elastic response of the matrix. The strain rate–stress relationship of the SnBi alloys has been evaluated in the range from 90 to 450 MPa. Three stress regions dominated by different rate-controlling mechanisms exist for the SnBi alloys with Bi concentration greater than 10%. At the high stress region (>370 MPa), dislocation glide dominates the creep rate where the stress exponents are greater than 10. At the intermediate stress region (200–370 MPa), dislocation climb is the dominant creep mechanism with stress exponents around 5–8. When fine lamellar structure is the dominant constituent of the microstructure, phase boundary sliding is identified as the rate-controlling mechanism in the low stress region (<200 MPa). 2013-07-11T02:20:47Z 2019-12-06T19:47:02Z 2013-07-11T02:20:47Z 2019-12-06T19:47:02Z 2012 2012 Journal Article https://hdl.handle.net/10356/97815 http://hdl.handle.net/10220/11161 10.1016/j.msea.2012.07.120 en Materials science and engineering: A © 2012 Elsevier B.V.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Materials
spellingShingle DRNTU::Engineering::Materials
Shen, Lu
Septiwerdani, Pradita
Chen, Zhong
Elastic modulus, hardness and creep performance of SnBi alloys using nanoindentation
description A series of SnBi alloys with Bi concentration ranging from 3% to 70% have been studied by nanoindentation technique at room temperature. Constant strain rate (CSR) method was used to evaluate the elastic modulus, hardness and the creep stress exponent of the alloys. SnBi solid solutions with Bi concentration up to 10 wt% show significantly higher modulus and hardness than pure Sn. Small amount of Bi precipitates inside Sn-rich phase effectively enhance the hardness and creep resistance of the alloy; while such distribution of Bi particles has no effect on the elastic response of the matrix. The strain rate–stress relationship of the SnBi alloys has been evaluated in the range from 90 to 450 MPa. Three stress regions dominated by different rate-controlling mechanisms exist for the SnBi alloys with Bi concentration greater than 10%. At the high stress region (>370 MPa), dislocation glide dominates the creep rate where the stress exponents are greater than 10. At the intermediate stress region (200–370 MPa), dislocation climb is the dominant creep mechanism with stress exponents around 5–8. When fine lamellar structure is the dominant constituent of the microstructure, phase boundary sliding is identified as the rate-controlling mechanism in the low stress region (<200 MPa).
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Shen, Lu
Septiwerdani, Pradita
Chen, Zhong
format Article
author Shen, Lu
Septiwerdani, Pradita
Chen, Zhong
author_sort Shen, Lu
title Elastic modulus, hardness and creep performance of SnBi alloys using nanoindentation
title_short Elastic modulus, hardness and creep performance of SnBi alloys using nanoindentation
title_full Elastic modulus, hardness and creep performance of SnBi alloys using nanoindentation
title_fullStr Elastic modulus, hardness and creep performance of SnBi alloys using nanoindentation
title_full_unstemmed Elastic modulus, hardness and creep performance of SnBi alloys using nanoindentation
title_sort elastic modulus, hardness and creep performance of snbi alloys using nanoindentation
publishDate 2013
url https://hdl.handle.net/10356/97815
http://hdl.handle.net/10220/11161
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