TY - JOUR
T1 - Glass-to-glass transition enables superhigh thermal stability and glass formability for thermoplastic shaping of FeBNbYCr alloys
AU - Li, Yongtai
AU - Wen, Donghui
AU - Huang, Zhaowen
AU - Kong, Fengyu
AU - Li, Mingcan
AU - Zhao, Chengliang
AU - Wu, Zhenduo
AU - Wang, Anding
PY - 2023/7/1
Y1 - 2023/7/1
N2 - Fe-based bulk metallic glasses (BMGs) exhibit attractive properties, yet their thermal stability and glass formability (GFA) are always lower than the other thermoplastic shaping (TPS) alloys. Here, we developed a new Cr-doped Fe65B22.8Nb3.7Y4.5Cr4 alloy with a super-wide supercooled liquid region (SCLR) (ΔTx=112 K) and high GFA (≥ 3 mm) with industrial materials. Glassy rods can maintain the glassy structure after annealing and hot pressing at 923 K, and exhibit a high fracture strength of > 3000 MPa and hardness of > 900 Hv in annealed states. The BMG rods can be conveniently TPS in the SCLR with low compressive stress of < 250 MPa. It is found that the additional glass-to-glass transition (GGT) in the SCLR effectively improves the GFA and thermal stability, by complicating and postponing the transition and crystallization process. The introduction of GGT offers a new strategy to develop high-performance BMGs for precision TPS. © 2023 Elsevier B.V.
AB - Fe-based bulk metallic glasses (BMGs) exhibit attractive properties, yet their thermal stability and glass formability (GFA) are always lower than the other thermoplastic shaping (TPS) alloys. Here, we developed a new Cr-doped Fe65B22.8Nb3.7Y4.5Cr4 alloy with a super-wide supercooled liquid region (SCLR) (ΔTx=112 K) and high GFA (≥ 3 mm) with industrial materials. Glassy rods can maintain the glassy structure after annealing and hot pressing at 923 K, and exhibit a high fracture strength of > 3000 MPa and hardness of > 900 Hv in annealed states. The BMG rods can be conveniently TPS in the SCLR with low compressive stress of < 250 MPa. It is found that the additional glass-to-glass transition (GGT) in the SCLR effectively improves the GFA and thermal stability, by complicating and postponing the transition and crystallization process. The introduction of GGT offers a new strategy to develop high-performance BMGs for precision TPS. © 2023 Elsevier B.V.
KW - Fe-based metallic glass
KW - Glass formability
KW - Glass to glass transition
KW - Thermal stability
KW - Thermoplastic shaping
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85152127194&origin=recordpage
U2 - 10.1016/j.jnoncrysol.2023.122332
DO - 10.1016/j.jnoncrysol.2023.122332
M3 - RGC 21 - Publication in refereed journal
SN - 0022-3093
VL - 611
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
M1 - 122332
ER -