Effects of Solution Cooling Rate on Microstructure and Hardness of X-750 Superalloy

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Shamsian Mahya; ARABI HOSSEIN; BOUTORABI SEYED MOHAMMAD ALI

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Journal: FOUNDING RESEARCH JOURNAL Year:2020 | Volume:4 | Issue:3 Page(s): 145-153

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Information Journal Paper

Title

Effects of Solution Cooling Rate on Microstructure and Hardness of X-750 Superalloy

Author(s)

Shamsian Mahya | ARABI HOSSEIN | BOUTORABI SEYED MOHAMMAD ALI | Issue Writer Certificate

Keywords

Inconel X-750

Superalloy heat treatment

Particle size of γ'-γ' Morphology

Cooling rate after solution treatment

Abstract

X-750 Superalloy is a precipitation hardened nickel-chromium alloy that maintains its corrosion and oxidation resistance up to 704 ° C. Although with increasing temperatures up to 704 ° C most of the effects of hard deposition are eliminated, the heat treatment components have a good strength up to 982 ° C. For this reason, it is important to apply heat treatment to stabilize the precipitation phases in the X-750 superalloy. The purpose of this study was to investigate the effect of cooling rate on the microstructure and changes in the morphology and size of the particles size of γ ' in the X-750 superalloy as well as the relationship between microstructure and hardness. For this purpose, during two-step heat treatment of solution and aging treatment to obtain optimum γ ' particle size, different cooling rates after solution treatment were taken and visual analyzes were performed on the obtained microstructures. The results showed that nucleation of secondary γ ' particles occurred after cooling rate after solution but their growth was dependent on the aging temperature. The formation of secondary γ ' is also dependent on the cooling environment after dissolution and with increasing cooling rate, the amount of secondary γ ' depositional particles decreases. Also, with increasing Cooling rate after solution treatment, the average size of initial γ ' particles decreased from 126. 5 to 30 nm and their percentage increased from 59 to 66. 91. The highest hardness belongs to the 2-AC heat treatment cycle, which has the highest amount of γ ' particles.

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APA: Copy

Shamsian, Mahya, ARABI, HOSSEIN, & BOUTORABI, SEYED MOHAMMAD ALI. (2020). Effects of Solution Cooling Rate on Microstructure and Hardness of X-750 Superalloy. FOUNDING RESEARCH JOURNAL, 4(3 ), 145-153. SID. https://sid.ir/paper/373610/en

Vancouver: Copy

Shamsian Mahya, ARABI HOSSEIN, BOUTORABI SEYED MOHAMMAD ALI. Effects of Solution Cooling Rate on Microstructure and Hardness of X-750 Superalloy. FOUNDING RESEARCH JOURNAL[Internet]. 2020;4(3 ):145-153. Available from: https://sid.ir/paper/373610/en

IEEE: Copy

Mahya Shamsian, HOSSEIN ARABI, and SEYED MOHAMMAD ALI BOUTORABI, “Effects of Solution Cooling Rate on Microstructure and Hardness of X-750 Superalloy,” FOUNDING RESEARCH JOURNAL, vol. 4, no. 3 , pp. 145–153, 2020, [Online]. Available: https://sid.ir/paper/373610/en

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