Structure and properties of cast blades made of ZhS3DK-VI alloy modified with nickel-yttrium ligature

Keywords

heat-resistant nickel alloy, cast blade, chemical composition, modification, yttrium, hot isostatic pressing, macro- and microstructure, mechanical properties.

Cite as

Tоmkin D. O., Pedash O. O., Danilov S. M., Klochikhin V. V., Naumyk O. O., and Naumyk V. V. Structure and properties of cast blades made of ZhS3DK-VI alloy modified with nickel-yttrium ligature. Physicochemical Mechanics of Materials. 2023. 59(4), 95-101.

https://doi.org/10.15407/pcmm2023.04.095

Abstract

The structure and properties of the working cast blade of the heat-resistant ZhS3DK-VI  nickel alloy, modified with nickel-yttrium ligature ІТН-1, in the cast and standard heat-treated states, as well as after hot isostatic pressing (HIP) and subsequent heat treatment, were studied. It was established that the chemical composition, as well as the mechanical and heat-resistant properties of the material of the experimental cast blades, both without and after the НIP, are satisfactory and meet the requirements of standard OST 1 90126-85. In the feather and shank of the blade without НIP, an accumulation of shrinkage friability and microporosity up to ~ 180 and 117 mm, respectively, were found. The bending angle of the experimental blades after the НIP and standard heat treatment is 105–115° (without the formation of cracks). In the process of HIP at a temperature of 1210°C and a pressure of 160 MPa micropores and coarse particles that do not reach the surface of the parts (located in the internal volumes of the metal) are healed. Micropores are practically absent in the structure of the examined blades after HIP, which contributes to the stabilization of the structure and properties of the material. The size of the single micropores present after the НIP, detected in the places of coarse debris concentration before the НIP operation, does not exceed 30 mm.

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