EFFECT OF DISLOCATION DENSITY ON DUCTILE-BRITTLE TRANSITION TEMPERATURE IN BULK Fe-3%Si SINGLE CRYSTALS

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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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1995/V31/I5/197

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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