Deformation induced martensite in NiTi and its shape memory effects generated by low temperature laser shock peening

Yiliang Liao, Chang Ye, Dong Lin, Sergey Suslov, Gary J. Cheng

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

In this study, laser shock peening (LSP) was utilized to generate localized deformation induced martensite (DIM) in NiTi shape memory alloy. The DIM was investigated by x-ray diffraction and transmission electron microscopy. The effects of temperature and laser intensity on DIM transformation were investigated. It has been found that higher laser intensity and lower processing temperature leads to higher volume fraction of DIM. This is attributed to the increase of the chemical driving force and the increase in the density of potential martensite variant for martensite nucleation at low temperatures. The localized shape memory effect in micrometer scale after low temperature LSP has been evaluated.

Original languageEnglish
Article number033515
JournalJournal of Applied Physics
Volume112
Issue number3
DOIs
Publication statusPublished - Aug 2012
Externally publishedYes

Fingerprint

peening
martensite
shock
lasers
shape memory alloys
high power lasers
micrometers
x ray diffraction
nucleation
transmission electron microscopy
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Deformation induced martensite in NiTi and its shape memory effects generated by low temperature laser shock peening. / Liao, Yiliang; Ye, Chang; Lin, Dong; Suslov, Sergey; Cheng, Gary J.

In: Journal of Applied Physics, Vol. 112, No. 3, 033515, 08.2012.

Research output: Contribution to journalArticle

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