| BRITTLE-DUCTILE TRANSITION OF ANNEALEMBRITTLED Fe_(75)Si_(10)B_(15)METALLIC GLASS |
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| 作者姓名： | DAVIES H A |
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| 作者单位： | School of |
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| 摘 要： | Studies were made of the effect of mechanical pulverization on relaxation,crystallizationand brittle-ductile transition of the anneal-embrittled Fe_(75)Si_(10)B_(15) metallic glass rib-bon.Results show that the Curie temperature,T_C,decreases and the total enthalpy ofrelaxation increases gradually with variation of pulverized time.DSC traces reveal anextra exothermic peak,T_X_1,and a distinct glass transition endothermic peak,T_g_1,withincreasing pulverized time,T_C,T_X_1,and T_g_1 decrease simultaneously,and the exother-mic peak area corresponding to T_X_1 increases gradually.The surface slip-steps of flakyparticles and their corresponding shear are produced by pulverizing the pre-embrittledamorphous glass.The lost ductility of the glass may restore during annealing.
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| 收稿时间： | 1992-10-11 |
| 修稿时间： | 1992-10-11 |
BRITTLE-DUCTILE TRANSITION OF ANNEALEMBRITTLED Fe_(75)Si_(10)B_(15)METALLIC GLASS |
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| DAVIES H A.BRITTLE-DUCTILE TRANSITION OF ANNEALEMBRITTLED Fe_(75)Si_(10)B_(15)METALLIC GLASS[J].Acta Metallurgica Sinica(English Letters),1992,5(10):292-299. |
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| Authors: | WANG Longbao State Key Laboratory of Rapidly Solidified Non-Equilibrium Alloys |
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| Affiliation: | WANG Longbao State Key Laboratory of Rapidly Solidified Non-Equilibrium Alloys,Institute of Metal Research Academia Sinica,Shenyang,ChinaDAVIES H A School of Materials,University of Sheffield,U.K |
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| Abstract: | Studies were made of the effect of mechanical pulverization on relaxation,crystallization and brittle-ductile transition of the anneal-embrittled Fe_(75)Si_(10)B_(15) metallic glass rib- bon.Results show that the Curie temperature,T_C,decreases and the total enthalpy of relaxation increases gradually with variation of pulverized time.DSC traces reveal an extra exothermic peak,T_X_1,and a distinct glass transition endothermic peak,T_g_1,with increasing pulverized time,T_C,T_X_1,and T_g_1 decrease simultaneously,and the exother- mic peak area corresponding to T_X_1 increases gradually.The surface slip-steps of flaky particles and their corresponding shear are produced by pulverizing the pre-embrittled amorphous glass.The lost ductility of the glass may restore during annealing. |
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| Keywords: | mechanical pulverization Fe_(75)Si_(10)B_(15) metallic glass shear band |
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