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Effect of the potential function and strain rate on mechanical behavior of the single crystal Ni-based alloys: A molecular dynamics study |
| Qian Yin(尹倩)1, Ye-Da Lian(连业达)1,†, Rong-Hai Wu(巫荣海)1,‡, Li-Qiang Gao(高利强)1, Shu-Qun Chen(陈树群)2, and Zhi-Xun Wen(温志勋)1 |
1 School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an 710129, China;
2 Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing 100124, China |
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Abstract Molecular dynamics has been widely used to study the fundamental mechanism of Ni-based superalloys. However, the effect of the potential function and strain rate on mechanical behavior has rarely been mentioned in the previous molecular dynamics studies. In the present work, we show that the potential function of molecular dynamics can dramatically influence the simulation results of single crystal Ni-based superalloys. The microstructure and mechanical behavior of single crystal Ni-based superalloys under four commonly used potential functions are systematically compared. A most suitable potential function for the mechanical deformation is critically selected, and based on it, the role of strain rate on the mechanical deformation is investigated.
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Received: 05 March 2021
Revised: 08 May 2021
Accepted manuscript online: 08 May 2021
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PACS:
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02.70.Ns
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(Molecular dynamics and particle methods)
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61.50.-f
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(Structure of bulk crystals)
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61.72.Nn
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(Stacking faults and other planar or extended defects)
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61.72.Lk
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(Linear defects: dislocations, disclinations)
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| Fund: Project supported by National Science and Technology Major Project of China (Grant No. 2017-IV-0003-0040), Fundamental Research Funds for the Central Universities in NWPU, China (Grant No. 31020180QD088), the National Natural Science Foundation of China (Grant Nos. 12002275 and 51904015), the Natural Science Foundation of Shaanxi Province, China (Grant No. 2020JQ-125), and General Program of Science and Technology Development Project of Beijing Municipal Education Commission, China (Grant No. KM202010005008). |
Corresponding Authors:
Ye-Da Lian, Rong-Hai Wu
E-mail: lianyeda@nwpu.edu.cn;ronghai.wu@nwpu.edu.cn
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Cite this article:
Qian Yin(尹倩), Ye-Da Lian(连业达), Rong-Hai Wu(巫荣海), Li-Qiang Gao(高利强), Shu-Qun Chen(陈树群), and Zhi-Xun Wen(温志勋) Effect of the potential function and strain rate on mechanical behavior of the single crystal Ni-based alloys: A molecular dynamics study 2021 Chin. Phys. B 30 080204
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