Microstructure Evolution During Post-heat Treatment of Haynes 282 Alloy Processed by Wire-Arc Additive Manufacturing

Pizano, Luis Fernando Ladinos; Sridar, Soumya; Sudbrack, Chantal K.; Xiong, Weihao

doi:10.1007/978-3-031-27447-3_46

Cited by 2 publications

(1 citation statement)

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“…The relationship between aging heat treatment, microstructure, and the room-temperature yield strength of WFAM Haynes 282 remains an open area of investigation. Limited reports exist on WFAM Haynes 282, Zinke et al [ 14 ] explored the influence of shielding gas on mechanical properties, Zhang et al [ 3 ] did a systematically studied the carbide precipitates evolution, and Pizano et al [ 15 ] found solution treatment temperature should increase from 1150°C to 1250°C to eliminate grain texture developed during WFAM. However, whether the conventional two-step heat treatment can achieve a yield strength comparable to desired yield strength of wrought counterparts (715 MPa) [ 16 ] remains unclear.…”

Section: Introductionmentioning

confidence: 99%

Aging heat treatment design for Haynes 282 made by wire-feed additive manufacturing using high-throughput experiments and interpretable machine learning

Wang,

Ladinos Pizano,

Sridar

et al. 2024

Science and Technology of Advanced Materials

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Wire-feed additive manufacturing (WFAM) produces superalloys with complex thermal cycles and unique microstructures, often requiring optimized heat treatments. To address this challenge, we present a hybrid approach that combines high-throughput experiments, precipitation simulation, and machine learning to design effective aging conditions for the WFAM Haynes 282 superalloy. Our results demonstrate that the γ’ radius is the critical microstructural feature for strengthening Haynes 282 during post-heat treatment compared with the matrix composition and γ’ volume fraction. New aging conditions at 770°C for 50 hours and 730°C for 200 hours were discovered based on the machine learning model and were applied to enhance yield strength, bringing it on par with the wrought counterpart. This approach has significant implications for future AM alloy production, enabling more efficient and effective heat treatment design to achieve desired properties.

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Section: Introductionmentioning

confidence: 99%