Investigation of Influence of Quenching and Annealing on the Plane Fracture Toughness and Brittle to Ductile Transition Temperature of the Zinc Coated Structural Steel Materials

Investigation of Influence of Quenching and Annealing on the Plane Fracture Toughness and Brittle to Ductile Transition Temperature of the Zinc Coated Structural Steel Materials

M. Ramesh (Department of Mechanical Engineering, University of Petroleum and Energy Studies, Dehradun, India), Rajnish Garg (Department of Mechanical Engineering, University of Petroleum and Energy Studies, Dehradun, India) and Garimella V. Subrahmanyam (Department of Mechanical Engineering, University of Petroleum and Energy Studies, Dehradun, India)
DOI: 10.4018/IJSEIMS.2017070103

Abstract

This article discusses that the variation in fracture toughness is exclusively due to the influence of coating on the surface of the material, depending upon the time interval that the specimen is immersed in the coating tub under a specific temperature. Parameters during the process of coating have shown their own influence on heat treatment, which has shown its own significance of the fracture toughness of coated and uncoated materials. Hence, to estimate this effect, EN 18 and AISI 1020 steels have been tested under different heat treatment processes, like annealing, oil-quenching and water-quenching. The results obtained under these conditions have clearly shown that the influence of heat treatment is significant on the fracture toughness of the materials. Compared to untreated materials, the annealed and quenched materials have shown much variation in fracture toughness.
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Materials And Experimentation

Charpy impact test is performed on the annealed, oil and water quenched structural materials which are coated with zinc. The specimen preparations and experimentations implemented are explained below.

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