Investigation of heat affected zone softening in armour steels Part 1 – Phase transformation kinetics
Source abstract
Abstract
Heat affected zone (HAZ) softening in two armour steels (high hard and flash processed) was investigated by monitoring phase transformations during simulated welding thermal cycles. The high hard steel was produced by conventional thermomechanical processing followed by quench and tempering. Flash processed steel was produced by rapid heating and cooling of a spheroidised steel to produce a mixed microstructure. Heat affected zone softening in high hard steel was observed on heating to a peak temperature below Ac1 due to overtempering of the original microstructure. In flash processed steel, the softening was associated with allotriomorphic ferrite formation when heated to a peak temperature between Ac1 and Ac3. The above results demonstrate the importance of initial microstructure on HAZ on phase transformation transients and associated softening in armour steels.
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Research context
OpenAlex topics: Microstructure and Mechanical Properties of Steels · Hydrogen embrittlement and corrosion behaviors in metals · Welding Techniques and Residual Stresses
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Ford Motor Company, Dearborn, MI 48126, USA
Materials Science and Engineering, Welding Engineering Program, Ohio State University, Columbus, OH 43221, USA
SFP Works LLC, Washington, MI 48095, USA
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