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MECHANISM OF ANNEALING EMBRITTLEMENT OF AMORPHOUS Fe_(79)B_(16)Si_5 ALLOY |
CHE Xiaozhou; SUN Baode; HU Gengxiang(Shanghai Jiaotong University; Shanghai 200030); CAO Xingguo(Luoyang Institute of Technology; Luoyang 471039); DAI Lizhi(Central Iron & Steel Research Institute; Ministry of Metallurgical Industry;Beijing 100081)(Manuscript received 1995-05-30) |
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Cite this article:
CHE Xiaozhou; SUN Baode; HU Gengxiang(Shanghai Jiaotong University; Shanghai 200030); CAO Xingguo(Luoyang Institute of Technology; Luoyang 471039); DAI Lizhi(Central Iron & Steel Research Institute; Ministry of Metallurgical Industry;Beijing 100081)(Manuscript received 1995-05-30). MECHANISM OF ANNEALING EMBRITTLEMENT OF AMORPHOUS Fe_(79)B_(16)Si_5 ALLOY. Acta Metall Sin, 1996, 32(2): 202-206.
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Abstract Activation energies for the ductile-brittle transition, structural relaxation and crystallization of the amorphous Fe_(79)B_(16)Si_5 alloy have been determined. The relations of annealing embrittlement with structural relaxation and crystallization have been investigated.The activation energy for ductile-brittle transition is 125 kJ/ mol, which is close to the activation energy for the change of atomic interactions during structural relaxation (85kJ/ mol), but is much lower than that for the formation of α-Fe during the early stage of crystallization (374-399 kJ/ mol). It is apparent that the annealing embrittlement of amorphous Fe_(79)B_(16)Si_5 alloy is related to the atomic short range ordering during structural relaxation. And there is no relationship between the embrittlement behaviour and crystallization.(Correspondent: CHE Xiaozhou, post doctoral, Department of Materials Science, Shanghai Jiaotong University, Shanghai 200030)
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Received: 18 February 1996
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