Effect of pouring temprature on the microstructure and hot tensile properties of castNi-Febase super alloy

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Mirak Ali Reza; Ghodsi Mahsa

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Journal: METALLURGICAL ENGINEERING Year:2018 | Volume:21 | Issue:2 (70) Page(s): 108-117

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Title

Effect of pouring temprature on the microstructure and hot tensile properties of castNi-Febase super alloy

Author(s)

Mirak Ali Reza | Ghodsi Mahsa | Issue Writer Certificate

Keywords

Ni-Fe base superalloyQ1

N155Q1

pouring tempratureQ2

microstructureQ1

hot tensile propertiesQ1

Abstract

In this research effect of pouring temperature on the microstructure characteristics and hot tensileproperties of an experimental Ni-Fe based superalloy N-155 has been investigated. the melt wasmade in induction furnace by vacuum melting. All samples were poured in the preheated ceramic mould in different pouring temprature include of 1420, 1460, 1500, 1540 and 1580 ° C and cooled down to room temprature in isolated condition. The microstructure charactristics was analised by SEM and EDS techniques. The hot mechanicalproperties was caried out in 816° C for each casting condition. The results show that the main microstructure consist of austenite as only dominate phase and the second perciptation phase concist of MCN carbunitride as shown in continuous films precipteted in a long of grain boundaries. A fine equiaxed / cellural structure can be shown in pouring temprature less than 1460° C due to initial dissolved carbides. The microstructure was modified to coarse dendritic structure enlongated in heat transfer direction at higher pouring temprature around of 1500 ° C. The carbides morphology change from particle-like and coarse film in low pouring temperature to the thin and continous films which precipitated around of grains boundaries. The hot UTS strength reached to 310 Mpa in 1500 ° C due to modified structure and reduced to 245 Mpa because of enlarged grainsand also elongation increases as pouring temperature rises.

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APA: Copy

Mirak, Ali Reza, & Ghodsi, Mahsa. (2018). Effect of pouring temprature on the microstructure and hot tensile properties of castNi-Febase super alloy. METALLURGICAL ENGINEERING, 21(2 (70) ), 108-117. SID. https://sid.ir/paper/403619/en

Vancouver: Copy

Mirak Ali Reza, Ghodsi Mahsa. Effect of pouring temprature on the microstructure and hot tensile properties of castNi-Febase super alloy. METALLURGICAL ENGINEERING[Internet]. 2018;21(2 (70) ):108-117. Available from: https://sid.ir/paper/403619/en

IEEE: Copy

Ali Reza Mirak, and Mahsa Ghodsi, “Effect of pouring temprature on the microstructure and hot tensile properties of castNi-Febase super alloy,” METALLURGICAL ENGINEERING, vol. 21, no. 2 (70) , pp. 108–117, 2018, [Online]. Available: https://sid.ir/paper/403619/en

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