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Lehigh Preserve Institutional Repository

Robert J. Hamlin

2015Englishthermal treatmentheat treatmentphysical metallurgystainless steelsprecipitation hardeningmicrostructure

Abstract

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This thesis investigates the microstructural evolution and mechanical properties of simulated heat affected zones in cast precipitation hardened stainless steels 17-4 and 13-8+Mo. The objective is to understand how these materials respond to thermal cycling, which is crucial for their applications in engineering. A combination of experimental techniques, including thermal cycling tests, microstructural characterization, and mechanical testing, was employed to analyze the behavior of these steels under simulated welding conditions. Results indicate that the microstructural changes, such as phase transformations and precipitate distributions, significantly influence the mechanical properties, including hardness and tensile strength. Furthermore, the findings reveal differences in response between the two steel grades due to their distinct compositions and processing histories. This study contributes to the fundamental knowledge required for optimizing the performance of stainless steels in critical applications, thus enhancing their reliability and safety in engineering practices.

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  title={Lehigh Preserve Institutional Repository},
  author={Robert J. Hamlin},
  year={2015},
  language={English}
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TI  - Lehigh Preserve Institutional Repository
AU  - Robert J. Hamlin
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