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Acta Metall Sin  1995, Vol. 31 Issue (5): 197-200    DOI:
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EFFECT OF DISLOCATION DENSITY ON DUCTILE-BRITTLE TRANSITION TEMPERATURE IN BULK Fe-3%Si SINGLE CRYSTALS
BAO Jinsheng; YANG Cheng; HA Kuanfu(Jilin University; Changchun 130023)
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BAO Jinsheng; YANG Cheng; HA Kuanfu(Jilin University; Changchun 130023). EFFECT OF DISLOCATION DENSITY ON DUCTILE-BRITTLE TRANSITION TEMPERATURE IN BULK Fe-3%Si SINGLE CRYSTALS. Acta Metall Sin, 1995, 31(5): 197-200.

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Abstract  The ductile-brittle transition temperature of Fe-3% Si single crystals under tensile tests with strain rate varying from 5 × 10~(-1) s~(-1) to 5 ×10~(-3) s~(-1) was investigated. It was shown that the transition temperature is nearly independent of the dislocation density difference of two order of magnitude, but quite different from that in Fe-3 % Si polycrystal.
Key words:  dislocation density      ductile-brittle transition temperature      single crystal     
Received:  18 May 1995     
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1哈宽富,王秀华.金属学报,1993;29:A5202OhrSM.MaterSciEng,1985;72:13 AshbyMF,EmburyJD,ScrMetall,1985;19:5574 RineboltJA,HarrisWJ.TransASM,1951:43:11755HullD.ActaMetall,1961;9:1916Petch NJ.PhilosMag,1958;3:10897ArmstrongRW.Fracture.Wiley-MIT.NewYork,1959:314
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