DIMPLE FORMATION ON FRACTURE SURFACE OF STEEL 55SiMnMo

Acta Metall Sin

1992, Vol. 28

Issue (10): 41-44 DOI:

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DIMPLE FORMATION ON FRACTURE SURFACE OF STEEL 55SiMnMo

LIANG Sizu; LIANG Yaoneng; LIU Zhengyi (South China University of Technology; Guangzhou)

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LIANG Sizu; LIANG Yaoneng; LIU Zhengyi (South China University of Technology; Guangzhou). DIMPLE FORMATION ON FRACTURE SURFACE OF STEEL 55SiMnMo. Acta Metall Sin, 1992, 28(10): 41-44.

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Abstract The fracture surface of the normalized steel 55SiMnMo was observed, under tensile testing device equipped on SEM, to be of ductile dimple feature in the bainite which are composed of austenite and ferrite. The dimple is almost nucleated in the ferrite. Because the austenitic plastic deformation is remarkable during fracturing, the tear ridge of dimple is very sharp.

Key words: dimple plastic deformation ductile fracture steel 55SiMnMo

Received: 18 October 1992

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