Evolution of Aging Treatment Effect on the Microstructure and Hardness of a Co-Al-W-Ti-Ta Based Superalloy

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Etminan Mostafa; MORAKABATI MARYAM; Qazi Mirsaeid Sayed Mahdi

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Journal: FOUNDING RESEARCH JOURNAL Year:2020 | Volume:4 | Issue:2 Page(s): 89-98

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Information Journal Paper

Title

Evolution of Aging Treatment Effect on the Microstructure and Hardness of a Co-Al-W-Ti-Ta Based Superalloy

Author(s)

Etminan Mostafa | MORAKABATI MARYAM | Qazi Mirsaeid Sayed Mahdi | Issue Writer Certificate

Keywords

Novel Co-base superalloy

Aging heat treatment

Microstructure

Hardness

Abstract

The aim of this study was to investigate the effect of temperature and time of aging on the Microstructure and Hardness of the novel Co-based superalloy with the composition of Co-7Al-7W-4Ti-2Ta. For this purpose, the new generation cobalt-based superalloy ingot cast by the VIM and VAR furnaces. Then aging treatment was performed at 700, 800 and 900° C for 8, 16 and 24 hours. Then, the specimens were cooled in air. Subsequently, the specimens were subjected to microstructural examinations by optical and electron microscopy and Hardness test. The results showed that by increasing aging temperature from 700° C to 800° C, the γ ʹ precipitation and its growth occurred and its volume fraction and size increased. Therefore, the maximum Hardness obtained for the specimen aged at 800° C. By increasing the temperature of aging to 900 o C, the Hardness decreased which was attributed to the precipitation of harmful β phase containing CoAl-Ti and consumption of γ ʹ alloying elements results in reduction of the γ ʹ volume fraction.

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APA: Copy

Etminan, Mostafa, MORAKABATI, MARYAM, & Qazi Mirsaeid, Sayed Mahdi. (2020). Evolution of Aging Treatment Effect on the Microstructure and Hardness of a Co-Al-W-Ti-Ta Based Superalloy. FOUNDING RESEARCH JOURNAL, 4(2 ), 89-98. SID. https://sid.ir/paper/380128/en

Vancouver: Copy

Etminan Mostafa, MORAKABATI MARYAM, Qazi Mirsaeid Sayed Mahdi. Evolution of Aging Treatment Effect on the Microstructure and Hardness of a Co-Al-W-Ti-Ta Based Superalloy. FOUNDING RESEARCH JOURNAL[Internet]. 2020;4(2 ):89-98. Available from: https://sid.ir/paper/380128/en

IEEE: Copy

Mostafa Etminan, MARYAM MORAKABATI, and Sayed Mahdi Qazi Mirsaeid, “Evolution of Aging Treatment Effect on the Microstructure and Hardness of a Co-Al-W-Ti-Ta Based Superalloy,” FOUNDING RESEARCH JOURNAL, vol. 4, no. 2 , pp. 89–98, 2020, [Online]. Available: https://sid.ir/paper/380128/en

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