Effect of Al Concentration on Fe-17cr Alloy During Steam Oxidation at 400°C

Roy, Indranil; Abouelella, Hamdy; Rajendran, Rupesh; Chikhalikar, Atharva; Larsen, Michael Due; Umretiya, Rajnikant V.; Hoffman, Andrew; Rebak, Raúl B.

doi:10.2139/ssrn.4218685

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“…Ferritic (FeCrAl) alloys with high Cr (>=12 wt.%) and Al (~5 wt. %) content have been extensively studied as accident tolerant material suitable for nuclear cladding applications due to their proven superior hydrothermal corrosion resistance at normal operating conditions (~300° C) and excellent high temperature (~1000° C) steam oxidation resistance [1,2]. Ferritic stainless alloys (including FeCrAl), however, may suffer from aging embrittlement at 475°C [3] approximately which could affect performance of FeCrAl alloys in industrial environments.…”

Section: Introduction 11 General Introductionmentioning

confidence: 99%

Elucidating Precipitation in FeCrAl Alloys through Explainable AI: A Case Study

Roy

Ravi

Roychowdhury

et al. 2022

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Primary challenge of using FeCrAl in high temperature industrial setting is the formation of α’- precipitates that causes brittleness in the alloy, resulting in failure through fracture. The precipitation causes hardness change during thermal aging which is sensitive to both alloy composition and experimental condition (i.e., temperature and time of heat treatment). A Gaussian Process Regression (GPR) model is built on the hardness data collected at GE Research. Subsequently, for the first time, SHapley Additive exPlanations (SHAP) built upon the GPR is used as an Explainable Artificial Intelligence (XAI) tool to understand the effect of feature values in driving the hardness change. Several key insights are affirmed and obtained from a material science perspective.

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Section: Introduction 11 General Introductionmentioning

confidence: 99%