Prototypic Lightweight Alloy Design for Stellar-Radiation Environments
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in: Advanced science, Jahrgang 7, Nr. 22, 2002397, 18.11.2020.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - Prototypic Lightweight Alloy Design for Stellar-Radiation Environments
AU - Tunes, Matheus A.
AU - Stemper, Lukas
AU - Greaves, Graeme
AU - Uggowitzer, Peter J.
AU - Pogatscher, Stefan
N1 - Publisher Copyright: © 2020 The Authors. Published by Wiley-VCH GmbH
PY - 2020/11/18
Y1 - 2020/11/18
N2 - The existing literature data shows that conventional aluminium alloys may not be suitable for use in stellar-radiation environments as their hardening phases are prone to dissolve upon exposure to energetic irradiation, resulting in alloy softening which may reduce the lifetime of such materials impairing future human-based space missions. The innovative methodology of crossover alloying is herein used to synthesize an aluminium alloy with a radiation resistant hardening phase. This alloy—a crossover of 5xxx and 7xxx series Al-alloys—is subjected to extreme heavy ion irradiations in situ within a TEM up to a dose of 1 dpa and major experimental observations are made: the Mg32(Zn,Al)49 hardening precipitates (denoted as T-phase) for this alloy system surprisingly survive the extreme irradiation conditions, no cavities are found to nucleate and displacement damage is observed to develop in the form of black-spots. This discovery indicates that a high phase fraction of hardening precipitates is a crucial parameter for achieving superior radiation tolerance. Based on such observations, this current work sets new guidelines for the design of metallic alloys for space exploration.
AB - The existing literature data shows that conventional aluminium alloys may not be suitable for use in stellar-radiation environments as their hardening phases are prone to dissolve upon exposure to energetic irradiation, resulting in alloy softening which may reduce the lifetime of such materials impairing future human-based space missions. The innovative methodology of crossover alloying is herein used to synthesize an aluminium alloy with a radiation resistant hardening phase. This alloy—a crossover of 5xxx and 7xxx series Al-alloys—is subjected to extreme heavy ion irradiations in situ within a TEM up to a dose of 1 dpa and major experimental observations are made: the Mg32(Zn,Al)49 hardening precipitates (denoted as T-phase) for this alloy system surprisingly survive the extreme irradiation conditions, no cavities are found to nucleate and displacement damage is observed to develop in the form of black-spots. This discovery indicates that a high phase fraction of hardening precipitates is a crucial parameter for achieving superior radiation tolerance. Based on such observations, this current work sets new guidelines for the design of metallic alloys for space exploration.
KW - alloy design
KW - aluminium alloys
KW - extreme environments
KW - space exploration
KW - space materials
UR - http://www.scopus.com/inward/record.url?scp=85091688746&partnerID=8YFLogxK
U2 - 10.1002/advs.202002397
DO - 10.1002/advs.202002397
M3 - Article
AN - SCOPUS:85091688746
VL - 7
JO - Advanced science
JF - Advanced science
SN - 2198-3844
IS - 22
M1 - 2002397
ER -