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Thermoplastic micro-formability of TiZrHfNiCuBe high entropy metallic glass 被引量:4
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作者 Xinyun Wang wenlei dai +2 位作者 Mao Zhang Pan Gong Ning Li 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2018年第11期2006-2013,共8页
High entropy metallic glasses(MGs) have attracted tremendous attentions owing to high entropy that benefits the probing of new MG-forming systems. However, the micro-formability of high entropy MGs is lack of invest... High entropy metallic glasses(MGs) have attracted tremendous attentions owing to high entropy that benefits the probing of new MG-forming systems. However, the micro-formability of high entropy MGs is lack of investigation in comparison with these conventional MG counterparts, which is crucial to the development of this kind of metallic alloys. In this work, the thermoplastic mciro-formability of TiZrHfNiCuBe high entropy MG was systemically investigated. Time-Temperature-Transformation(TTT)curve was first constructed based on isothermal crystallization experiments, which provides thermoplastic processing time of the supercooled high entropy MGs. By comparison with the deformation map,Newtonian flow was found beneficial to the thermoplastic formability. While the thermoplastic forming becomes arduous with reducing mould size to tens micrometer, because of the strong supercooled TiZrHfNiCuBe high entropy MG(fragility = 27). Fortunately, the micro-formability of TiZrHfNiCuBe high entropy MG could be improved by vibration loading, as demonstrated by finite-element-method simulation. Our findings not only systemically evaluate the thermoplastic micro-formability of high entropy MG, but also provide fundamental understanding of the phenomenon. 展开更多
关键词 Metallic glass High entropy Thermoplastic forming Supercooled liquid region
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