TY - JOUR
T1 - Solidification Behavior and Cooling Curves for Hypereutectic Fe-21 At. Pct B Alloy
AU - Xu, Junfeng
AU - Jian, Zengyun
AU - Dang, Bo
AU - Zhang, Di
AU - Liu, Feng
N1 - Publisher Copyright:
© 2017, The Minerals, Metals & Materials Society and ASM International.
PY - 2017/4/1
Y1 - 2017/4/1
N2 - The cooling curves for Fe-21 at. pct B hypereutectic alloy were measured, which are correlated with the solidification behaviors. At small undercoolings, the cooling curve has two recalescences, corresponding to L → Fe2B and L → Fe2B + Fe, respectively. At moderate undercoolings, also two recalescences can be observed from the cooling curve, corresponding to L → Fe3B and L + Fe3B → Fe2B + Fe. At large undercoolings, the cooling curve has only one recalescence, corresponding to L → Fe3B + Fe. From TEM analysis, the matrix phase is α-Fe in cases of solidification at small and moderate undercoolings, but is Fe3B in case of large undercooling. HRTEM analysis shows that α-Fe stores deformation energy by irregular atom region, but intermetallic phase (Fe2B or Fe3B) stores deformation energy by increasing grain boundaries and stacking faults, which can explain why α-Fe has good deformation ability and small hardness, but the Fe2B or Fe3B phase on the contrary.
AB - The cooling curves for Fe-21 at. pct B hypereutectic alloy were measured, which are correlated with the solidification behaviors. At small undercoolings, the cooling curve has two recalescences, corresponding to L → Fe2B and L → Fe2B + Fe, respectively. At moderate undercoolings, also two recalescences can be observed from the cooling curve, corresponding to L → Fe3B and L + Fe3B → Fe2B + Fe. At large undercoolings, the cooling curve has only one recalescence, corresponding to L → Fe3B + Fe. From TEM analysis, the matrix phase is α-Fe in cases of solidification at small and moderate undercoolings, but is Fe3B in case of large undercooling. HRTEM analysis shows that α-Fe stores deformation energy by irregular atom region, but intermetallic phase (Fe2B or Fe3B) stores deformation energy by increasing grain boundaries and stacking faults, which can explain why α-Fe has good deformation ability and small hardness, but the Fe2B or Fe3B phase on the contrary.
UR - http://www.scopus.com/inward/record.url?scp=85010782412&partnerID=8YFLogxK
U2 - 10.1007/s11661-016-3941-5
DO - 10.1007/s11661-016-3941-5
M3 - 文章
AN - SCOPUS:85010782412
SN - 1073-5623
VL - 48
SP - 1817
EP - 1826
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 4
ER -