BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Fracture and fatigue in additively manufactured alloys - Prof. Upa
 drasta Ramamurty\, School of Mechanical and Aerospace Engineering\, Nanyan
 g Technological University\, Singapore
DTSTART:20231004T130000Z
DTEND:20231004T140000Z
UID:TALK205495@talks.cam.ac.uk
CONTACT:Hilde Hambro
DESCRIPTION:Additive manufacturing (AM) of metallic components offers a nu
 mber of technological advantages such as near-net shape forming using a si
 ngle processing step\, flexible and on-demand manufacturing\, near-zero ma
 terial loss during fabrication\, etc. Additionally\, alloys made with AM t
 echniques such as laser powder bed fusion (LPBF) have substantially finer 
 microstructures (due to rapid solidification) and distinct mesoscale featu
 res. A synergetic interplay between these micro- and meso-structural featu
 res leads to high strength – toughness combinations. However\, certain o
 ther intrinsic features such as microporosity can adversely affect the fat
 igue resistance in AM alloys. In contrast\, the fatigue strength (σf) of 
 binder jet printed 316L austenitic stainless steel\, which contain signifi
 cant amounts of pores\, are surprisingly comparable to those of the conven
 tionally manufactured 316L whereas the LPBF specimens are far inferior in 
 terms of σf although the porosity in them is relatively smaller. All thes
 e results are rationalized by recourse to the distinct microstructures of 
 AM alloys and how they affect plasticity and crack growth. Implications of
  these results in terms of possible directions for designing AM alloys wit
 h high mechanical performance will be discussed.
LOCATION:Oatley Seminar Room\, Department of Engineering
END:VEVENT
END:VCALENDAR