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Title:
Microstructural evolution and mechanical properties in Cu48Zr48Al4 bulk metallic glass composites induced by He+ ion irradiation
Author: Wei YH; Zhang K(张坤); Wei BC(魏炳忱); Zhao ZQ; Yuan JM
Source: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Issued Date: 2018-05
Volume: 428, Pages:17-23
Abstract:

The irradiation-induced phase transformation and mechanical property stability of the Cu48Zr48Al4 bulk metallic glass composites (BMGCs) were investigated. An obvious structural transformation occurred from the B2-CuZr phase to the B19′-CuZr and the B33-CuZr phases following irradiation, when the dose increased from 2.5 × 1017 ions/cm2 to 1.0 × 1018 ions/cm2. This change was accompanied by the changes of the maximum displacement per atomic (DPA) increasing from 21.5 dpa to 86 dpa. The mean surface roughness increased as the incident dose increased. The local exfoliation occurred at the maximal dose. The changes of mechanical properties were characterized via nanoindentation. The hardness and Young's modulus in the amorphous regions decreased as the dose increased. In contrast, the crystalline regions presented a distinct hardening effect, due to the appearance of the martensitic phases. The macroscopic hardness of the BMGCs obtained by the Vickers indentation instrument was basically unchanged after irradiation. The results suggested that these materials maintained a stable performance, because of the combined effects of hardening and softening. This study could aid the design of novel materials that are subjected to irradiation circumstance.

Keyword: Ion irradiationMetallic glass compositesMartensitic transformationNanoindentation
Language: 英语
Indexed Type: SCI
Corresponding Author: 魏炳忱
DOI: 10.1016/j.nimb.2018.05.003
Department: NML空间材料物理力学
Ranking: 1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/73155
Appears in Collections:国家微重力实验室_期刊论文

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description.institution: 1.Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
2.School of Engineering Science, University of Chinese Academy of Sciences, Beijing 101408, China

Recommended Citation:
Wei YH,Zhang K,Wei BC,et al. Microstructural evolution and mechanical properties in Cu48Zr48Al4 bulk metallic glass composites induced by He+ ion irradiation[J]. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms,2018-05-01,428:17-23.
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文件名: 2018-Microstructural evolution and mechanical properties in Cu48Zr48Al4 bulk.pdf
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