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SUMMARY:IMX Talks - Strengthening and strain hardening from solute cluster
 s in Aluminium alloys
DTSTART:20250901T110000
DTEND:20250901T120000
DTSTAMP:20260922T014116Z
UID:7a15826335abd72e71836a1ac153b5a077f2501fbb301138f400d191
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Christopher Hutchinson\, Department of Materials Science
  and Engineering\, Monash University\, Victoria Australia\n \nIn this pre
 sentation\, I will first provide a brief introduction to my group and the 
 physical and mechanical metallurgy activities at Monash University. I will
  then provide an example of work on cluster effects in Al alloys.\nWe will
  first discuss the effects of solute clusters on the strengthening of Al a
 lloys by comparing the clusters formed during natural aging\, and those fo
 rmed during cyclic plasticity\, in commercial Al alloys. Using atom probe 
 tomography\, we demonstrate that these different processing routes lead to
  important differences in the chemistries of the clusters formed. The shea
 ring strength of the individual cluster is quantified and shown to be prop
 ortional to the solute content of the cluster\, across a range of age hard
 enable Al alloys.\nWe then consider the effects of these solute clusters o
 n the strain hardening behaviour and compare them with the effects of shea
 rable precipitates formed through conventional artificial aging. We demons
 trate that some alloys show that dynamic recovery first becomes more diffi
 cult as the yield strength increases\, then\, after passing through a mini
 mum in dynamic recovery rate\, dynamic recovery becomes easier as the yiel
 d strength continues to increase. We propose a model to link the macroscop
 ic dynamic recovery behaviour to the underlying mechanisms of plasticity i
 n relation to the distribution of solute\, clusters and precipitates in th
 e studied alloys.\n\nBio: Professor Christopher Hutchinson’s research c
 overs all aspects of the metallurgy of engineering alloys. This includes w
 ork on Steels and Stainless steels\, Aluminium alloys\, Copper and Brasses
 \, Titanium alloys and Magnesium alloys.\nChristopher’s emphasis is on m
 anipulation of the chemistry and processing of engineering alloys to creat
 e new alloy structures that exhibit improved combinations of mechanical pr
 operties such as strength\, elongation\, impact\, wear and fatigue etc.\nA
 pproximately half of his research is conducted in collaboration with Indus
 try (automotive\, aerospace\, rail\, manufacturing\, oil and gas) and half
  funded by fundamental research agencies such as the Australian Research C
 ouncil (ARC). Professor Hutchinson was a recipient of an ARC Future Fellow
 ship in the inaugural round of 2009\, was a Chief Investigator in the ARC 
 Centre of Excellence for Design in Light Metals (2005-2013) and is current
 ly a Chief Investigator in the ARC Industry Transformation Training Centre
  in Alloy Innovation for Mining Efficiency (2016-2021).\nChristopher’s w
 ork combines\, in roughly equal parts\, advanced experimentation and chara
 cterisation (including electron microscopy\, synchrotron x-ray radiation a
 nd neutron diffraction) and theory and computer modelling of the response 
 of alloy structures to changes in materials processing and deformation.\nC
 urrent projects include the development of new ultra-high strength steels 
 (>2GPa) for the automotive industry\, process optimization for 3rd genera
 tion advanced high strength steels (AHSS)\, new ‘dynamically responding
 ’ fatigue resistant Al alloys with properties that improve rather than d
 eteriorate during loading\, recrystallization studies of commercial Al all
 oys\, surface modification of engineering alloys\, 3D printing of stainles
 s steels for on-demand replacement parts\, and process optimisation for th
 ermo-mechanical processing of Brasses.\nIn addition to his core metallurgy
  focus\, Professor Hutchinson is involved in a large range of Civil Engine
 ering and Architecture projects where he provides metallurgy expertise.\n
  
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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