Effects of Temperature and Time of secondary solution heat treatment on γ ’ phase distribution of GTD-111 polycrystalline superalloy

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Tavakkoli Mehrdad; SEIFOLLAHI MASUMEH; ABBASI SEYED MAHDI; Ghazi Mirsaeed Seyed Mahdi

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Journal: METALLURGICAL ENGINEERING Year:2019 | Volume:22 | Issue:1 (73) Page(s): 42-51

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Title

Effects of Temperature and Time of secondary solution heat treatment on γ ’ phase distribution of GTD-111 polycrystalline superalloy

Author(s)

Tavakkoli Mehrdad | SEIFOLLAHI MASUMEH | ABBASI SEYED MAHDI | Ghazi Mirsaeed Seyed Mahdi | Issue Writer Certificate

Keywords

GTD-111 superalloyQ1

secondary solution heat treatmentQ1

γ’phase distributionQ1

eutectic phaseQ1

Abstract

The creation of γ ’ phase uniform distribution is very important on the performanceof superalloys. The addition of secondary solution annealing stage to the conventional heat treatment process of the GTD-111 polycrystalline superalloy which is one of the useful industrial superalloys can lead to improving the microstructure of this alloy by decreasing the amount of eutectic phase and increasing the volume percent andmodifying distribution ofγ ’ phase. In this article, the effects of temperatures of 960, 980 and 1000 ° C and times of 1, 2, 4 and 8 hrs on the microstructure of GTD-111 superalloy are investigated. Microstructural investigations by OM and SEM methods show the secondary solution heat treatment at temperature of 980˚ C for 4 hrs leads to improving the microstructure with respect to decreasing the eutectic phase amount to 4 volume percent and increasing the γ ’ strengthening phase volume percent to 54%. Also, the morphology of γ ’ phase after this heat treatment is cuboidal with unimodal and homogenous distribution in the matrix phase. The microstructures of GTD-111 heat treated atother temperatures and times are discussed in the article.

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APA: Copy

Tavakkoli, Mehrdad, SEIFOLLAHI, MASUMEH, ABBASI, SEYED MAHDI, & Ghazi Mirsaeed, Seyed Mahdi. (2019). Effects of Temperature and Time of secondary solution heat treatment on γ ’ phase distribution of GTD-111 polycrystalline superalloy. METALLURGICAL ENGINEERING, 22(1 (73) ), 42-51. SID. https://sid.ir/paper/391738/en

Vancouver: Copy

Tavakkoli Mehrdad, SEIFOLLAHI MASUMEH, ABBASI SEYED MAHDI, Ghazi Mirsaeed Seyed Mahdi. Effects of Temperature and Time of secondary solution heat treatment on γ ’ phase distribution of GTD-111 polycrystalline superalloy. METALLURGICAL ENGINEERING[Internet]. 2019;22(1 (73) ):42-51. Available from: https://sid.ir/paper/391738/en

IEEE: Copy

Mehrdad Tavakkoli, MASUMEH SEIFOLLAHI, SEYED MAHDI ABBASI, and Seyed Mahdi Ghazi Mirsaeed, “Effects of Temperature and Time of secondary solution heat treatment on γ ’ phase distribution of GTD-111 polycrystalline superalloy,” METALLURGICAL ENGINEERING, vol. 22, no. 1 (73) , pp. 42–51, 2019, [Online]. Available: https://sid.ir/paper/391738/en

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