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Effect of Electric Field on Solidification Structure of Directionally Solidified Peritectic Alloys |
WANG Guotian1( ), WANG Qiang1, GUO Jianhua1, DING Hongsheng2, SUN Hongzhe2 |
1.College of Automobile and Transportation Engineering, Heilongjiang Institute of Technology, Harbin 150050, China 2.National Key Laboratory for Precision Hot Processing of Metals, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
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Cite this article:
WANG Guotian, WANG Qiang, GUO Jianhua, DING Hongsheng, SUN Hongzhe. Effect of Electric Field on Solidification Structure of Directionally Solidified Peritectic Alloys. Chinese Journal of Materials Research, 2022, 36(7): 545-551.
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Abstract It is known that the AMPD-4.1% SCN (Aminomethyl Propanediol-4.1% Succinonitrile) transparent hypoperitectic polymer alloy and the Ni3Al hypoperitectic alloy present the similarity in directional solidification behavior, therefore, the former was selected as the reference material to simulate the effect of DC current on the directional solidification process of the later one. During the experiment, the real-time photo shooting and real-time temperature recording were carried out by the microscope photosensitive device (CCD) and an intelligent communication temperature measuring instrument. The results show that under the action of electric field, the primary β phase particles of the directionally crystallized subperitectic alloy migrate to the positive pole, which facilitates the peritectic reaction by making the composition of liquid phase near peritectic point at the frontier of solidification interface. The special growth morphology of dendrite tip splitting and the dendrite spacing decreasing of directionally solidified dendrite tip under the action of electric field may be mainly caused by Joule heating effect caused by electric field and supercooling caused by solute enrichment. Last but not least, results of the similar experiment for Ni3Al-based alloy Ni-20Al-10Fe-0.2B proved fairly well the above observed growth morphology of the AMPD-4.1% SCN transparent hypoperitectic polymer alloy.
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Received: 24 April 2021
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Fund: National Natural Science Foundation of China(51471062);Doctor Foundation Project of Heilongjiang Institute of Technology(2019BJ03);Research Project of Basic Scientific Research Business Expenses of Heilongjiang Provincial Undergraduate Colleges and Universities in 2021(2021GJ10);Program for Provincial-Level Leading Talents Team Training of Heilongjiang Institute of Technology(2020LJ04) |
About author: WANG Guotian, Tel: 13836023153, E-mail: guotianw@139.com
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