BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Nanostructured bulk steels
DTSTART:20141117T131500
DTEND:20141117T141500
DTSTAMP:20260407T084725Z
UID:828c6169da76d6b5e6d180cf7c2ef7a2af488a3df519a3e4222cf44d
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Dierk Raabe\, Max-Planck Institut für Eisenforschung\, 
 Düsseldorf\, Germany\nDeveloping strong\, damage-tolerant\, and functiona
 l steels shapes the backbone for industrial innovations in manufacturing\,
  energy\, transportation\, and safety. Examples are Fe-Cr steels for emiss
 ion-reduced turbines\; weight reduced and ultra-high strength Fe-Mn-Al ste
 els for light-weight and safe mobility\; magnetic Fe-Si steels for low-los
 s electrical motors and generators\; or stainless steels for power plants.
  These examples document the necessity of developing improved high strengt
 h and yet ductile steels. Most traditional hardening mechanisms\, however\
 , such as enabled by solutes\, dislocations\, or precipitates\, albeit lea
 ding to high strength\, often reduce ductility rendering the material brit
 tle and susceptible for failure. This phenomenon is sometimes referred to 
 as the inverse strength-ductility problem.\nReduction the grain size offer
 s a pathway for increasing both\, strength and toughness. Here we develop 
 this concept further in that we combine this strategy with the manipulatio
 n of individual interfaces by grain boundary segregation and even local ph
 ase transformation. More specific\, we enable grain boundaries in steels n
 ot only as barriers against dislocation motion but also as regions where s
 egregation and nanoscale phase transformation occur. Such locally transfor
 med regions can act as compliance layers impeding for instance crack penet
 ration among lath martensite lamellae.\n• Duarte MJ\, Klemm J\, Klemm SO
 \, Mayrhofer KJJ\, Stratmann M\, Borodin S\, Romero AH\, Madinehei M\, Cre
 spo D\, Serrano J\, Gerstl SSA\, Choi PP\, Raabe D\, & Renner FU\, II. Ele
 ment-Resolved Corrosion Analysis of Stainless-Type Glass-Forming Steels. S
 cience 2013\; 341: 372-376.\n• Raabe D\, Sandloebes S\, Millan J\, Ponge
  D\, Assadi H\, Herbig M\, & Choi P-P. Segregation engineering enables nan
 oscale martensite to austenite phase transformation at grain boundaries: A
  pathway to ductile martensite. Acta Materialia 2013\; 61: 6132-6152.\n•
  Herbig M\, Raabe D\, Li Y\, Choi P\, Zaefferer S\, Goto S\, Atomic-Scale 
 Quantification of Grain Boundary Segregation in Nanocrystalline Material\,
  Phys Rev Letters 112\, 126103 (2014)\nBio: Dierk Raabe holds Dipl-Ing. (s
 umma cum laude) and Dr.-Ing. (summa cum laude) degrees in physical metallu
 rgy and metal physics from RWTH Aachen. Currently he is Chief Executive of
  the Max-Planck Institut für Eisenforschung in Düsseldorf and Professor 
 at RWTH Aachen University. His focus is in physical metallurgy and materia
 ls physics. Specifically he works on the simulation and mechanical propert
 ies of metallic alloys. He wrote and edited several books on this topic\, 
 e.g. ‘Computational Materials Science’ (1998)\, Continuum Scale Simula
 tion of Engineering Materials’ (2005)\, and ‘Crystal Plasticity FEM in
  Materials Science and Engineering’ (2010) as well as more than 400 peer
  reviewed publications (more than 8500 cites\, H-factor 49). Dierk Raabe i
 s also active in transferring computational materials engineering into ind
 ustrial practice.\nRaabe’s work places emphasis on the comparison of sim
 ulations with novel experimental results conducted under complex boundary 
 conditions. Currently\, Raabe aims at the integration of quantum mechanica
 l simulations into engineering materials design and property predictions. 
 This changes computational materials science from a descriptive into a pre
 dictive method. A special feature of the approach is that atomistic simula
 tions are combined with atomic scale characterization and the actual synth
 esis and processing of new alloys. The common vision of these activities i
 s the use of predictive simulations and their consequent engineering appli
 cation for inventing advanced alloys. The aim is the physically-based desi
 gn of materials with superior properties (strength\, elongation\, damage t
 olerance) for the fields of energy\, mobility and health from the atomic t
 o the macro-scale under consideration of synthesis and processing. The ble
 nd of theory\, characterization\, and processing is important in Raabe’s
  work. He is a frequent plenary and keynote speaker. In 2004 he received t
 he highest German research award (Leibniz-Award). 2008 Raabe was awarded L
 ee Hsun Lecture Award of the Institute of Metal Research of the Chinese Ac
 ademy of Sciences and in 2011 the Weinberg Lecture Award of the University
  of British Columbia. In 2012 he received an ERC advanced grant. Raabe men
 tored more than 50 Ph.D.s\, many of whom now hold leading positions in com
 panies and academia as faculty members in the US\, UK\, and Asia. Since 20
 10 he is a member of the Science Advisory Board of the German Government. 
 Since 2012 he is the chairman of the Governors Board of RWTH Aachen Univer
 sity. He is a member of the National Academy Leopoldina.
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR