TY - JOUR
T1 - Comparative study on microstructure evolution upon unidirectional and multidirectional cold working in an Fe-15%Cr ferritic alloy
AU - Belyakov, Andrey
AU - Tsuzaki, Kaneaki
AU - Kimura, Yuuji
AU - Kimura, Yoshisato
AU - Mishima, Yoshinao
PY - 2007/5/15
Y1 - 2007/5/15
N2 - Deformation microstructures of an Fe-15%Cr ferritic stainless steel during cold working to strains above 7 were studied. Two processing methods, unidirectional working consisting of bar rolling followed by swaging and multidirectional working involving multiple forging through three orthogonal axes, were used. The unidirectional deformation resulted in the evolution of a ribbon-like microstructure consisting of highly elongated grains. The mean grain size gradually decreased to about 0.4 μm during rolling/swaging to strains above 7. In contrast, the multiple forging resulted in the development of almost equiaxed fine grains with an average grain size of 0.45 μm at relatively small strains of about 4 followed by a slight grain refinement during further processing. On the other hand, both processing methods were characterised by almost the same strain dependence for the transverse grain and subgrain sizes, which were measured crosswise to the metal flow direction.
AB - Deformation microstructures of an Fe-15%Cr ferritic stainless steel during cold working to strains above 7 were studied. Two processing methods, unidirectional working consisting of bar rolling followed by swaging and multidirectional working involving multiple forging through three orthogonal axes, were used. The unidirectional deformation resulted in the evolution of a ribbon-like microstructure consisting of highly elongated grains. The mean grain size gradually decreased to about 0.4 μm during rolling/swaging to strains above 7. In contrast, the multiple forging resulted in the development of almost equiaxed fine grains with an average grain size of 0.45 μm at relatively small strains of about 4 followed by a slight grain refinement during further processing. On the other hand, both processing methods were characterised by almost the same strain dependence for the transverse grain and subgrain sizes, which were measured crosswise to the metal flow direction.
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U2 - 10.1016/j.msea.2006.12.063
DO - 10.1016/j.msea.2006.12.063
M3 - Article
AN - SCOPUS:33947378352
VL - 456
SP - 323
EP - 331
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
IS - 1-2
ER -