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Effect of Turning Amount on Metallurgical Qualities and Mechanical Properties of GH4169 Superalloy

by Jinglong Qu 1, Shufeng Yang 2,3,*, Zhengyang Chen 2,3, Jinhui Du 1, Jingshe Li 2,3,* and Di Wang 2,3
1
Beijing Central Iron and Steel Research Institute, Beijing 100081, China
2
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
3
Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials, Beijing 100083, China
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(11), 1852; https://doi.org/10.3390/ma12111852
Received: 10 May 2019 / Revised: 31 May 2019 / Accepted: 4 June 2019 / Published: 7 June 2019
The determination of an appropriate amount of turning for superalloy ingot surfaces, in a scientific and reasonable manner, is vital to the improvement of the metallurgical quality and comprehensive performance of superalloy ingots. In the present study, scanning electron microscopy with energy-dispersive spectroscopy, a high-temperature testing machine, a Brinell hardness tester and the Image-Pro Plus software were used to analyze and compare the types and amounts of inclusions, the average area of the (Al,Mg)O inclusions, and the mechanical properties of points at different distances from the edge of the GH4169 superalloy vacuum arc remelting (VAR) ingot edge. The effects of the amount of turning to which the superalloy is subjected, the metallurgical qualities, and the mechanical properties were systematically studied. The results showed that the five inclusion types did not change as the sampling locations moved away from the ingot edge, but the amount of inclusions and the average area of the (Al,Mg)O inclusions first decreased and then stabilized. Similarly, the tensile strength, elongation, section shrinkage, hardness, and fatigue life first increased and then stabilized. Finally, this experiment tentatively determined that an appropriate amount of turning for a GH4169 superalloy ingot is 36–48 mm. View Full-Text
Keywords: GH4169 superalloy; vacuum arc remelting; turning amount; inclusions; mechanical properties GH4169 superalloy; vacuum arc remelting; turning amount; inclusions; mechanical properties
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Qu, J.; Yang, S.; Chen, Z.; Du, J.; Li, J.; Wang, D. Effect of Turning Amount on Metallurgical Qualities and Mechanical Properties of GH4169 Superalloy. Materials 2019, 12, 1852.

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