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KMID : 1102020160460010045
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Applied Microscopy
2016 Volume.46 No. 1 p.45 ~ p.50
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Deformation Behavior of Corrosion-Resistant Fe-Cr Alloy
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Hidenori Era
Yusuke Kono
Ryota Sasabuchi
Noriko Miyoshi
Tatsuya Tokunaga
Nobuya Shinozaki
Lee Je-Hyun
Toshitada Shimozaki
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Abstract
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Iron containing a high amount of chromium is known to be inferior to ductility due to σ phase formation so that it is generally difficult to apply the plastic deformation process although the alloy possesses a superior characteristics of an excellent corrosion resistance. In this study, Fe-50mass%Cr alloy was melted using high purity powder and the deformation behavior has been investigated by cold rolling and tensile test. The tensile test yielded that the alloy revealed a serration at an early stage of tensile deformation and then the serrated flow vanished to change to a normal work hardening flow at the later stage. The former was governed by twin formation process, the latter by dislocation multiplication one, bringing about a high ductility of 20% or over. The reduction ratio in cold rolling was attained as high as 90%, thus the high corrosion-resistant alloy is able to possess a high ductility
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KEYWORD
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Iron chromium alloy, Laser melting, Deformation behavior, Corrosion resistance
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