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SUMMARY:IMX Talks - Microstructures and mechanical properties of additivel
 y manufactured alloys
DTSTART:20260318T140000
DTEND:20260318T150000
DTSTAMP:20260415T194711Z
UID:b6166dc277ace877f021b913b5708a662f5608d2e4bb2501a3206347
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Upadrasta Ramamurty\, President’s Chair Professor\, S
 chool of Mechanical & Aerospace Engineering\, Nanyang Technological Univer
 sity\, Singapore\nA 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 that demand a
  high degree of reliability. Such an understanding\, which allows for tail
 oring of advanced alloys for the targeted performances\, is well-establish
 ed for those manufactured using the conventional (CM) routes\, which offer
  several options for tuning the microstructures. However\, some of them—
 especially microstructural tuning through the judicious selection of the t
 hermo-mechanical processing steps—are not available for additively manuf
 actured (AM) metallic components. Alloys made with AM techniques such as l
 aser powder bed fusion (LPBF) have substantially finer microstructures (du
 e to rapid solidification) and distinct mesoscale features. Consequently\,
  their strength is often higher while the ductility is lower\, vis-à-vis 
 their CM counterparts. The meso-structural features\, a result of the ‘b
 ottom up’ approach of building components—line-by-line and layer-by-la
 yer with in-situ alloying capability—can impart very high fracture tough
 ness to these alloys. The presence of porosity\, which is inevitable given
  that the feedstock is often powder\, results in lowered unnotched fatigue
  resistance. Implications of these in terms of possible directions for des
 igning AM alloys with high mechanical performance will be discussed.\n\nBi
 o: After obtaining a PhD degree from Brown University under the supervisi
 on of Professor Subra Suresh and post-doctoral stints at UCSB and MIT\, Ra
 mamurty held faculty positions at the Nanyang Technological University\, S
 ingapore and the Indian Institute of Science\, Bangalore\, India\, before 
 returning to NTU in 2018 where he currently holds a President's Chair Prof
 essor position. His research interests include deformation and fracture be
 havior of amorphous as well as crystalline alloys\, additive manufacturing
 \, and the development and application of the nanoindentation technique. H
 e is an editor of Acta Materialia and Scripta Materialia\, and a Fellow of
  the Indian National Science Academy\, Indian National Academy of Engineer
 ing\, and TWAS-The World Academy of Sciences.\n 
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201 https://epfl.zoom.us/j/
 68431943389?pwd=uK1oWpbmDufeCVxmmYo142nq7nQdtz.1
STATUS:CONFIRMED
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