TY - JOUR
T1 - Novel predictive methodology of amorphisation of gas-atomised Fe-Si-B alloy powders
AU - Alvarez, Kenny L.
AU - Ahmadian Baghbaderani, Hasan
AU - Martín, José M.
AU - Burgos, Nerea
AU - McCloskey, Paul
AU - González, Julián
AU - Masood, Ansar
N1 - Publisher Copyright:
© 2021
PY - 2021/12/15
Y1 - 2021/12/15
N2 - The present work is focused on developing amorphisation capability criteria to predict regions with high amorphous forming ability (AFA) in the Fe-Si-B phase diagram. First, the AFA of Fe-Si-B alloy powders was evaluated by conventional empirical glass forming parameters, which eventually did not guide to the best AFA alloy. Then, AFA analysis was extended to the ternary phase diagram, calculated using CALPHAD, along with superimposed mathematical model based on topological instability factor (λ), estimated critical cooling rate (RC) and critical particle size (dC), to confine the phase diagram regions with larger AFA. The alloy with the highest AFA shows optimum atomic size mismatch when λ = 0.204. Furthermore, the optimal region in the phase diagram to design alloys with high AFA is where Fe2B is the first solid phase under equilibrium solidification. Within these two limits, the alloys with lower liquidus temperatures show the highest AFA for the gas-atomised powders.
AB - The present work is focused on developing amorphisation capability criteria to predict regions with high amorphous forming ability (AFA) in the Fe-Si-B phase diagram. First, the AFA of Fe-Si-B alloy powders was evaluated by conventional empirical glass forming parameters, which eventually did not guide to the best AFA alloy. Then, AFA analysis was extended to the ternary phase diagram, calculated using CALPHAD, along with superimposed mathematical model based on topological instability factor (λ), estimated critical cooling rate (RC) and critical particle size (dC), to confine the phase diagram regions with larger AFA. The alloy with the highest AFA shows optimum atomic size mismatch when λ = 0.204. Furthermore, the optimal region in the phase diagram to design alloys with high AFA is where Fe2B is the first solid phase under equilibrium solidification. Within these two limits, the alloys with lower liquidus temperatures show the highest AFA for the gas-atomised powders.
KW - Alloy design
KW - Amorphous forming ability
KW - Amorphous materials
KW - CALPHAD
KW - Gas-atomization
KW - Metallic glasses
UR - http://www.scopus.com/inward/record.url?scp=85114181115&partnerID=8YFLogxK
U2 - 10.1016/j.jnoncrysol.2021.121151
DO - 10.1016/j.jnoncrysol.2021.121151
M3 - Article
AN - SCOPUS:85114181115
SN - 0022-3093
VL - 574
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
M1 - 121151
ER -