Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Effect of Solute Copper on Hardness and Ductile-to-Brittle Transition in α-Iron
Junaidi SYARIFToshiyuki HOSHINOToshihiro TSUCHIYAMASetsuo TAKAKI
Author information
JOURNALS FREE ACCESS

2000 Volume 86 Issue 8 Pages 558-562

Details
Abstract

Effects of solute Cu on strengthening and ductile-to-brittle transition (DBT) of α-iron have studied for Fe-(02)mass%Cu alloys. The Fe-Cu alloys exhibit massive ferritic transformation on water-quenching from solution treatment temperature. With increasing Cu content, the massive ferrite grains were refined and the hardness was raised. Effect of the solid solution hardening is predominant to the strengthening, but the refinement of massive ferrite grains does not affect so much. Charpy impact tests showed that Cu addition substantially lowers DBT temperature of α-iron. The embrittleness at low temperature was caused by the onset of cleavage cracks at ferrite grain boundaries where deformation twins impinged. Copper in solution suppresses the formation of deformation twins, and this results in the shift of DBT temperature to lower side.

Information related to the author
© The Iron and Steel Institute of Japan
Previous article Next article
feedback
Top