爱游戏体育官方网站,msyz888明仕官网,伟德体育下载

报告题目：Strength, ductility, fracture toughness, and fatigue resistance of additively manufactured alloys

报告人：Prof. Upadrasta Ramamurty 新加坡南洋理工大学校长讲席教授、印度科学院院士、印度工程院院士和世界科学院院士

主持人： 王金斌 教授/材料科学院工程院长

报告时间：2025年11月4日（星期二）下午15:00-17:00

报告地点： 研究生楼A201

报告内容：

A detailed understanding of the correlations between the processing, microstructures, and mechanical performance of alloys is a must before they can be deployed for structural applications with a high degree of reliability. Such an understanding, which allows for tailoring of advanced alloys for the targeted performances, is well-established for those manufactured using the conventional route of manufacturing alloys. Moreover, there are several options available for tuning the microstructures in that route. However, some of them—especially microstructural tuning through the judicious selection of the thermo-mechanical processing steps—are not available in additive manufacturing (AM) of metallic components, which offers a number of technological advantages such as near-net shape forming using a single processing step, flexible and on-demand manufacturing, near-zero material loss during fabrication, etc. and hence is being pursued with considerable scientific and technological vigor across the world. However, alloys made with AM techniques such as laser powder bed fusion (LPBF) have substantially finer microstructures (due to rapid solidification) and distinct mesoscale features. Consequently, their strength is often higher while the ductility is lower, vis-à-vis CM alloys. The meso-structural features, a result of the ‘bottom up’ approach of building components—line-by-line and layer-by-layer with in-situ alloying capability—can impart very high fracture toughness to these alloys. The presence of porosity, which is inevitable given that the feedstock is powder, results in lowered unnotched fatigue resistance. Implications of these in terms of possible directions for designing AM alloys with high mechanical performance will be discussed.

报告人简介：

Upadrasta Ramamurty 教授，印度科学院院士、印度工程院院士及世界科学院院士(TWAS)，新加坡南洋理工大学校长讲席教授，新加坡科技研究局(A*STAR)首席科学家。

1994年在布朗大学获得博士学位，1994-1997年在加州大学-圣芭芭拉分：吐槭±砉ぱг合群蟠邮虏┦亢笪暗绿逵略。1997-2018年，先后在新加坡南洋理工大学和印度科学理工学院(班加罗尔)担任助理教授、副教授、教授。2018年至今在南洋理工大学担任校长讲席教授。

他的研究方向包括非晶和晶体合金的变形和断裂行为、增材制造以及纳米压痕技术的开发和应用等。在国际知名期刊学术沙龙380篇论文(h-index=91)，引用量超过30000余次，现任《Acta Materialia》和《Scripta Materialia》编辑。获Scopus青年科学家奖、TWAS奖、印度政府颁发的年度冶金学家奖、ShantiSwarup Bhatnagar奖、印度材料研究学天津体育直播先进材料CNR Rao讲座奖和中国科学院金属所李薰讲座奖。

                          爱游戏体育官方网站,msyz888明仕官网,伟德体育下载科技处

                           材料科学与工程学院