title: Novel Heating-Induced Reversion during Crystallization of Al-based Glassy Alloys.
abstract: Thermal stability and crystallization of three multicomponent glassy alloys, Al86Y7Ni5Co1Fe0.5Pd0.5, Al85Y8Ni5Co1Fe0.5Pd0.5and Al84Y9Ni4Co1.5Fe0.5Pd1, were examined to assess the ability to form the mixture of amorphous (am) and fcc-aluminum (α-Al) phases. On heating, the glass transition into the supercooled liquid is shown by the 85Al and 84Al glasses. The crystallization sequences are [am] → [am + α-Al] → [α-Al + compounds] for the 86Al and 85Al alloys, and [am] → [am + α-Al + cubic AlxMy(M = Y, Ni, Co, Fe, Pd)] → [am + α-Al] → [α-Al + Al3Y + Al9(Co, Ni)2+ unknown phase] for the 84Al alloy. The glass transition appears even for the 85Al alloy where the primary phase is α-Al. The heating-induced reversion from [am + α-Al + multicomponent AlxMy] to [am + α-Al] for the 84Al alloy is abnormal, not previously observed in crystallization of glassy alloys, and seems to originate from instability of the metastable AlxMycompound, in which significant inhomogeneous strain is caused by the mixture of solute elements. This novel reversion phenomenon is encouraging for obtaining the [am + α-Al] mixture over a wide range of high temperature effective for the formation of Al-based high-strength nanostructured bulk alloys by warm working.
authors.affiliation: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China.
authors.forename: F F
authors.initials: FF
authors.lastname: Han
authors.affiliation: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China.|International Institute of Green Materials, Josai International University, Togane, 283-8555, Japan.|Department of Physics, King Abdulaziz University, Jeddah, 22254, Saudi Arabia.|MISiS, National University of Science and Technology, Moscow, 119049, Russia.
authors.forename: A
authors.initials: A
authors.lastname: Inoue
authors.affiliation: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Han
authors.affiliation: International Institute of Green Materials, Josai International University, Togane, 283-8555, Japan.
authors.forename: F L
authors.initials: FL
authors.lastname: Kong
authors.affiliation: School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China.
authors.forename: S L
authors.initials: SL
authors.lastname: Zhu
authors.affiliation: Department of Physics, King Abdulaziz University, Jeddah, 22254, Saudi Arabia.
authors.forename: E
authors.initials: E
authors.lastname: Shalaan
authors.affiliation: Department of Physics, King Abdulaziz University, Jeddah, 22254, Saudi Arabia.
authors.forename: F
authors.initials: F
authors.lastname: Al-Marzouki
authors.affiliation: Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS, UK.
authors.forename: A L
authors.initials: AL
authors.lastname: Greer