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

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

doi:10.1016/j.scriptamat.2018.02.019

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

Liang Wang, Yakai Zhao, Lu Wang, Zhihua Nie, Benpeng Wang, Yunfei Xue^*, Haifeng Zhang, Huameng Fu, Dennis E. Brown, Yang Ren

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

5 Citations (Scopus)

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.

Original language	English
Pages (from-to)	112-116
Journal	Scripta Materialia
Volume	149
DOIs	https://doi.org/10.1016/j.scriptamat.2018.02.019
Publication status	Published - 1 May 2018
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

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

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https://www.sciencedirect.com/science/article/am/pii/S1359646218300915

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

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.",

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

author = "Liang Wang and Yakai Zhao and Lu Wang and Zhihua Nie and Benpeng Wang and Yunfei Xue and Haifeng Zhang and Huameng Fu and Brown, {Dennis E.} and Yang Ren",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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doi = "10.1016/j.scriptamat.2018.02.019",

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TY - JOUR

T1 - In-situ synchrotron X-ray diffraction study of dual-step strain variation in laser shock peened metallic glasses

AU - Wang, Liang

AU - Zhao, Yakai

AU - Wang, Lu

AU - Nie, Zhihua

AU - Wang, Benpeng

AU - Xue, Yunfei

AU - Zhang, Haifeng

AU - Fu, Huameng

AU - Brown, Dennis E.

AU - Ren, Yang

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2018/5/1

Y1 - 2018/5/1

N2 - 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.

AB - 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.

KW - Flow unit interconnection

KW - In-situ synchrotron X-ray diffraction

KW - Laser shock peening

KW - Metallic glass

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U2 - 10.1016/j.scriptamat.2018.02.019

DO - 10.1016/j.scriptamat.2018.02.019

M3 - RGC 21 - Publication in refereed journal

SN - 1359-6462

VL - 149

SP - 112

EP - 116

JO - Scripta Materialia

JF - Scripta Materialia

ER -

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

Abstract

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