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(11月7日 9:00)亚稳型高熵合金:设计、结构与性能

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LNM学术报告

报告题目:

亚稳型高熵合金:设计、结构与性能

 

报告人:                              李志明 

 

德国马普学会钢铁研究所

 

 

时间:2018117 (周三) 09:30     

地点:中国科学院力学研究所 会议中心 207

报告摘要:

The concept of high-entropy alloys (HEAs) has drawn great attention as it opens a new realm of compositional opportunities for designing novel materials with exceptional mechanical, physical and chemical properties. HEAs were originally proposed to contain multiple principal elements in near-equimolar ratios to stabilize single-phase solid solutions through maximizing configurational entropy. By overturning this original concept which targets for the formation of single-phase solid solution, we developed a novel class of HEAs with multiple compositionally equivalent high-entropy phases and transformation-induced plasticity effect. In this talk, I will first introduce this type of metastable HEAs by shedding light on the corresponding design principles and highlighting their superior strength-ductility combinations compared to the corresponding single-phase HEAs. Then I will introduce the recent new findings on the fundamental mechanisms underlying the transformation behavior in the metastable HEAs. Also, recent work by our research group on microstructural design of the metastable HEAs to further enhance the mechanical properties at various temperatures will be presented.

报告人简介:

李志明,德国马普学会钢铁研究所高熵合金研究组组长。目前主要从事新型多主元高熵合金的设计、加工、结构和性能研究。于2014年获上海交通大学材料科学与工程专业博士学位,博士就读期间于美国加州大学戴维斯分校联合培养。以第一或通讯作者在NatureAdvanced MaterialsActa Materialia等主流学术期刊发表论文40余篇;应邀主讲20余场学术报告;长期担任多种国际期刊审稿人,已评审稿件160余篇。

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