日本金属学会誌

J. Japan Inst. Metals, Vol. 43, No. 12 (1979),
pp. 1151-1157

Mechanical Properties and Fracture Behavior of Fe-Mn Alloys

Kazuo Yamanaka1 and Masamichi Kowaka1

1Central Research Laboratories Sumitomo Metal Industries, Ltd., Amagasaki

Abstract:

The micro-structure and the analysis of the metallurgical factors contributing to the strength and the toughness of Fe-Mn alloys containing up to 8 wt% Mn have been studied. The results obtained are as follows:
(1) Transformation products depended on the manganese contents and formed the equiaxed ferrite, massive ferrite and lath martensite in order with increasing manganese content.
(2) Yield strength and impact transition temperature were strongly influenced by the transformation products.
(3) The unit crack path gave experimentally good correlations with the ductile/brittle transition temperature.
(4) The fracture modes in the brittle temperature range depended on the manganese content: low manganese alloys showed cleavage fracture, and the intergranular fracture increased with increasing manganese content.


(Received 1979/05/1)

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