In-situ synchrotron X-ray diffraction study of dual-step strain variation in laser shock peened metallic glasses

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

  • Liang Wang
  • Yakai Zhao
  • Lu Wang
  • Zhihua Nie
  • Benpeng Wang
  • Yunfei Xue
  • Haifeng Zhang
  • Huameng Fu
  • Dennis E. Brown

Detail(s)

Original languageEnglish
Pages (from-to)112-116
Journal / PublicationScripta Materialia
Volume149
Publication statusPublished - 1 May 2018
Externally publishedYes

Abstract

Atomic-structure evolution is significant in understanding the deformation mechanism of metallic glasses. Here, we firstly find a dual-step atomic strain variation in laser-shock-peened (LSPed) metallic glasses during compression tests by using in-situ synchrotron X-ray diffraction. Under low compressive load, LSP-deformed zone's atomic-structure shows low Young's Modulus (E); with load increase, atomic-structure are re-hardened, showing high E. An atomic deformation mechanism is proposed by using flow unit model, that LSP could induce interconnected flow units and homogenize the atomic-structure. These interconnected flow units are metastable and start to annihilate during compressive loading, causing the dual-step atomic strain variation.

Research Area(s)

  • Flow unit interconnection, In-situ synchrotron X-ray diffraction, Laser shock peening, Metallic glass

Bibliographic Note

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Citation Format(s)

In-situ synchrotron X-ray diffraction study of dual-step strain variation in laser shock peened metallic glasses. / Wang, Liang; Zhao, Yakai; Wang, Lu; Nie, Zhihua; Wang, Benpeng; Xue, Yunfei; Zhang, Haifeng; Fu, Huameng; Brown, Dennis E.; Ren, Yang.

In: Scripta Materialia, Vol. 149, 01.05.2018, p. 112-116.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review