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Flakes in low carbon high strength low alloy steel

Flakes in low carbon high strength low alloy steel
Flakes in low carbon high strength low alloy steel
Flakes in low carbon high strength low alloy steel plates are not easily identified by macroetching because they form parallel to the plane of rolling and near to porosities and segregation lines in the steel plate. They also overlap each other after heavy deformation. Ultrasonic inspection and macrofracture examinations may be convenient and reliable methods for detecting them. The presence of flakes also results in diminished values for reduction of area in tensile tests, impact toughness in the vertical direction, and fatigue strengths. Flakes in plate mainly exist in granular bainite and other microstructures transformed at lower temperatures where Si, Mn, and V segregate. Scanning electron microscopy of flake fracture after heat treatment reveals a cloudrack morphology in the crack propagation region and a moth-eaten pattern at the edges of the flakes. The reasons for the formation of microstructural features of flakes and for the relation between flakes and inclusions are discussed.
1044-5803
15-21
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Yao, Wei-xun
8353efe3-8db8-44d2-a51d-a77d2c90967a
Cao, Yin-zhi
0aaa5ee8-1e91-4122-a570-4c7f6f1bd119
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Yao, Wei-xun
8353efe3-8db8-44d2-a51d-a77d2c90967a
Cao, Yin-zhi
0aaa5ee8-1e91-4122-a570-4c7f6f1bd119

Gao, Nong, Yao, Wei-xun and Cao, Yin-zhi (1992) Flakes in low carbon high strength low alloy steel. Materials Characterization, 28 (1), 15-21. (doi:10.1016/1044-5803(92)90025-D).

Record type: Article

Abstract

Flakes in low carbon high strength low alloy steel plates are not easily identified by macroetching because they form parallel to the plane of rolling and near to porosities and segregation lines in the steel plate. They also overlap each other after heavy deformation. Ultrasonic inspection and macrofracture examinations may be convenient and reliable methods for detecting them. The presence of flakes also results in diminished values for reduction of area in tensile tests, impact toughness in the vertical direction, and fatigue strengths. Flakes in plate mainly exist in granular bainite and other microstructures transformed at lower temperatures where Si, Mn, and V segregate. Scanning electron microscopy of flake fracture after heat treatment reveals a cloudrack morphology in the crack propagation region and a moth-eaten pattern at the edges of the flakes. The reasons for the formation of microstructural features of flakes and for the relation between flakes and inclusions are discussed.

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More information

Published date: 1992

Identifiers

Local EPrints ID: 22841
URI: https://eprints.soton.ac.uk/id/eprint/22841
ISSN: 1044-5803
PURE UUID: 9600d4d8-63c5-4e3c-b480-f0b06c3e481e

Catalogue record

Date deposited: 30 Jan 2007
Last modified: 17 Jul 2017 16:20

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