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Published in: Rare Metals 3/2024

02-12-2023 | Original Article

Elaborating strengthen mechanism of Pt–Ir solid solution superalloy at finite temperature

Authors: Wei Yu, Xiao-Yu Chong, Yun-Xuan Zhou, Meng-Di Gan, Ying-Xue Liang, Yan Wei, Ai-Min Zhang, Chang-Yi Hu, Xing-Yu Gao, Li Chen, Hai-Feng Song, Jing Feng

Published in: Rare Metals | Issue 3/2024

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Abstract

Pt–Ir alloy is potential superalloys used above 1300 °C because of their high strength and creep resistance. However, the ductility of Pt–Ir alloy has rapidly deteriorated with the increase of Ir, resulting in poor machinability. This work quantitatively evaluated the solid solution strengthening (SSS) and grain refinement strengthening (GRS) of Pt–Ir alloy using first-principles calculations combined with experimental characterization. Here, the stretching force constants in the second nearest neighbor region (SFC2nd) of pure Ir (193.7 eV·nm−2) are 3.40 times that of pure Pt (57.0 eV·nm−2), i.e., the interatomic interaction is greatly enhanced with the increase of Ir content, which leads to the decrease of ductility, and modulus misfit plays a dominant role in SSS. Then, the physical mechanisms responsible for the hardness (HV) of Pt–Ir alloy, using the power-law-scaled function of electron work function coupled SSS and GRS, are attributed to the electron redistribution caused by different Ir content. Furthermore, a thorough assessment of the thermodynamic characteristics of Pt–Ir binary alloy was conducted, culminating in development of a mapping model that effectively relates composition, temperature and strength. The results revealed that the compressive strength increases with the Ir content, and the highest strength was observed in Pt0.25Ir0.75. This study provides valuable insights into the Pt–Ir alloy system.

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Appendix
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Literature
[15]
[57]
go back to reference Chong XY, Shang SL, Krajewski AM, Shimanek JD, Du WH, Wang Y, Feng J, Shin D, Beese AM, Liu ZK. Correlation analysis of materials properties by machine learning: illustrated with stacking fault energy from first-principles calculations in dilute fcc-based alloys. J Phys-Condens Mat. 2021;33(29):295702. https://doi.org/10.1088/1361-648X/ac0195.CrossRef Chong XY, Shang SL, Krajewski AM, Shimanek JD, Du WH, Wang Y, Feng J, Shin D, Beese AM, Liu ZK. Correlation analysis of materials properties by machine learning: illustrated with stacking fault energy from first-principles calculations in dilute fcc-based alloys. J Phys-Condens Mat. 2021;33(29):295702. https://​doi.​org/​10.​1088/​1361-648X/​ac0195.CrossRef
Metadata
Title
Elaborating strengthen mechanism of Pt–Ir solid solution superalloy at finite temperature
Authors
Wei Yu
Xiao-Yu Chong
Yun-Xuan Zhou
Meng-Di Gan
Ying-Xue Liang
Yan Wei
Ai-Min Zhang
Chang-Yi Hu
Xing-Yu Gao
Li Chen
Hai-Feng Song
Jing Feng
Publication date
02-12-2023
Publisher
Nonferrous Metals Society of China
Published in
Rare Metals / Issue 3/2024
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI
https://doi.org/10.1007/s12598-023-02482-y

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