Negative Stacking Fault Energy in Metastable Face-centered Cubic Alloys

主讲人 : Song Lu 研究员

Stacking fault energy (SFE) plays an important role in deformation mechanisms and mechanical properties of face-centered cubic (fcc)  ls and alloys. Since early 60s, experimental methods for determining the SFE have been developed.  Nowadays, ab initio methods  d on the density functional theory (DFT) calculations and Calphad method are used for SFE calculations too. Interestingly, deviations between the results obtained by the different methods are frequently observed in some alloy systems like steels and high-entropy alloys. I will discuss the details about the methods and explore the possible reasons. I will also discuss the correlation between the negative SFE and the deformation mechanisms (twinning and martensitic transformation) and show cases that we design novel transformation-induced plasticity (TRIP) and twinning-induced plasticity (TWIP) alloys using the calculated SFEs.

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讲授人概述：Song Lu，德国欧洲国家高技术学习分析咨询中心顶尖科学课家、瑞典皇朝工院工程学员学习分析员、本科生生硕导。陆续获中科院生物复合所本科穴位，瑞典皇朝工院工程学员本科生穴位。曾任Thermo-Calc机构学习分析员、瑞典皇朝工院工程学员、德国图尔库师范大学学习分析员。大部分学习分析范畴为一、性道理估算，素材弊病与力学结构效能。已在新国际科研期刊上展现了100余篇学习分析文献资料，以及Acta Mater(13篇)、PNAS、PRB（9篇）等，主要负责欧洲经济共同体战略决策发展规划发展规划局、瑞典金属材料农学会工程5项，从事瑞典战略决策发展规划货币基金评审会常务专委会常务理事会。