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SUMMARY:Neutrons for Advancing High‑Temperature Superalloys
DTSTART:20260420T123000Z
DTEND:20260420T133000Z
DTSTAMP:20260502T110800Z
UID:indico-event-636@indico.frm2.tum.de
CONTACT:Nicolas.Walte@frm2.tum.de\;d.saha@fz-juelich.de
DESCRIPTION:Speakers: Steffen Neumeier (Friedrich-Alexander-Universität (
 FAU) Erlangen-Nürnberg)\n\nModern technologies such as aviation\, energy 
 conversion in gas turbines\, solar towers or fusion reactors\, aerospace a
 nd communication rely critically on high‑temperature structural material
 s. Among them\, Ni‑based superalloys are key materials of our society: t
 hey combine exceptional mechanical strength at high homologous temperature
 s with remarkable oxidation and corrosion resistance. To increase engine e
 fficiency and enable future hydrogen‑based energy systems\, new superall
 oys with enhanced high‑temperature capability and well‑understood hydr
 ogen effects are needed. Their development and characterization are demand
 ing\, since superalloys contain more than ten alloying elements\, exhibit 
 a complex hierarchical microstructure across multiple length scales\, and 
 even the site occupancy of the alloying element in the crystal lattice str
 ongly influences their properties. Moreover\, their microstructure and mec
 hanical behaviour evolve significantly with temperature\, requiring in‑s
 itu characterization techniques. \nNeutrons are uniquely suited to investi
 gate such structural materials due to their deep penetration\, excellent s
 ensitivity to light elements\, and suitability for in‑situ studies under
  extreme environments.\nIn this presentation\, complementary neutron diffr
 action and small‑angle neutron scattering results on new Ni‑ and Co‑
 based superalloys will be shown. Temperature‑dependent lattice misfit me
 asurements between the main phases explain the observed precipitate morpho
 logies and provide input for calculating interfacial dislocation force bal
 ances. Small‑angle scattering results allow optimisation of heat treatme
 nt routes to enhance mechanical performance. Furthermore\, neutron investi
 gations of hydrogen–lattice interactions reveal hydrogen partitioning be
 haviour and help elucidate mechanisms of hydrogen embrittlement.\nThese in
 sights demonstrate how neutron techniques contribute to designing more rob
 ust and efficient superalloys for demanding high‑temperature application
 s.\n\nhttps://indico.frm2.tum.de/event/636/
LOCATION:PH HS 3 (Physics Department)
URL:https://indico.frm2.tum.de/event/636/
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