“Speaker of the month” COLLOQUIUM
3D printing of metals: challenges and oppor
tunities for materials science
and engineering
by
<
strong>Prof. Upadrasta Ramamurty
Department of Materials Engi
neering, Indian Institute of Science
Bangalore-560012
This event was imported from: https://cens.res .in/en/about-us/people/eventdetail/165/-/3d-printing-of-metals-challenges-a nd-opportunities-for-materials-science-and-engineering?tmpl=component X-EXTRAINFO:For 3D printing of metallic components, selective laser melting (SLM) of po wders is the most commonly used method, which offers a number of technolog ical advantages such as near-net shape forming with zero material loss. Con sequently, there is a considerable and recent interest in this new way of m anufacturing components for advanced engineering applications.\nFrom the sc ientific perspective, this process offers a number of exciting\nopportuniti es, some of which I would like to discuss in this talk. The SLM process not only imparts a substantially finer microstructure but also distinct mesosc ale features to them. A complex interplay between these micro- and meso-str uctural features can lead to property combinations that were hitherto thoug ht as not possible. Some possible additional features that are specific to the SLM process are the presence of considerable residual stresses and micr oporosity. In this presentation, we will examine as to how all these featur es will affect the mechanical properties through a comprehensive microstruc tural and mechanical property characterization of several different alloy c omponents made through SLM, with particular emphasis on understanding their quasi-static tensile, fracture, fatigue crack growth, and unnotched fatigu e properties. We will demonstrate that while the SLM process offers new ave nues for material design that can exploit the micro- and meso-structures ge nerated by the process for simultaneous enhancement in strength and toughne ss, their fatigue resistance is a big concern due to the porosity. DTSTAMP:20260413T095643Z DTSTART;TZID=Indian/Mahe:20180112T153000 DTEND;TZID=Indian/Mahe:20180112T170000 SEQUENCE:0 TRANSP:OPAQUE END:VEVENT END:VCALENDAR