The Effects of Ultrasonic Nanocrystal Surface Modification Technique Temperature on Microstructure and Wear of Alloy 600

Jun Hyong Kim; Auezhan Amanov; Young Sik Pyun

doi:10.4028/www.scientific.net/MSF.879.926

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HomeMaterials Science ForumMaterials Science Forum Vol. 879The Effects of Ultrasonic Nanocrystal Surface...

The Effects of Ultrasonic Nanocrystal Surface Modification Technique Temperature on Microstructure and Wear of Alloy 600

Abstract:

Alloy 600 (UNS N06600) is an austenitic nickel-based alloy with superior corrosion resistance and high-temperature endurance, which determines its widespread applications in aeronautical, aerospace, marine and nuclear industries. Particularly, a number of nuclear components used Alloy 600 as their structure materials due to their high corrosion resistance, high-temperature endurance and excellent fabricant characteristics. Many failures have occurred in Alloy 600 with various forms of environmental degradations during long-term operation. In this study, an ultrasonic nanocrystal surface modification (UNSM) technique was applied to Alloy 600 at a room and a high temperature of 500 ^OC. The effects of UNSM treatment temperature on the microstructure and wear behavior including a compressive residual stress were investigated. The hardness, compressive residual stress with respect to depth from the top surface were measured. Also, the wear behavior of UNSM-treated at a room and a high temperature Alloy 600 specimen was compared to that of the untreated specimen. The increase in wear resistance by UNSM technique was discussed in terms of increased hardness, refined grain size and induced compressive residual stress.

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Periodical:

Materials Science Forum (Volume 879)

Pages:

926-931

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.879.926

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Online since:

November 2016

Authors:

Jun Hyong Kim, Auezhan Amanov, Young Sik Pyun*

Keywords:

Alloy 600, Friction, Surface Modification, Wear

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