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A Study on Statistical Properties of Vickers Hardness of Friction Welded Parts in Alloy718 Steel (Part 1. As-welded)  

Kwon, Hyeok-Yong (Graduate Student, School of Mechanical Engineering, Pukyong National University)
Choi, Sung-Yoong (Graduate Student, School of Mechanical Engineering, Pukyong National University)
Lee, Sang-Yeal (Department of Automotive Engineering, Pohang College)
Kong, Yu-Sik (Graduate Student, School of Mechanical Engineering, Pukyong National University)
Kim, Seon-Jin (Graduate Student, School of Mechanical Engineering, Pukyong National University)
Publication Information
Journal of Ocean Engineering and Technology / v.22, no.5, 2008 , pp. 87-93 More about this Journal
Abstract
The objective of this paper is the investigation of the statistical properties of Vickers hardness (HV) of friction welded parts in nickel based super resisting steel, alloy 718 steel. First, we examine the statistical properties on the case of as-welded parts. Several Virkers indentations were made under same nominal conditions. This was repeated for three different applied loads, 100, 200 and 300g with a duration time, 10 second. The arithmetic mean of Vickers hardness in base metal (BM) materials is larger than that of HAZ in all applied loads. The measure of dispersion, that is, the coefficient of variation (COV) for BM and HAZ is decreased by increasing with the applied load. The distribution of Vickers hardness was not found to be symmetric type. The probability distribution of Vickers hardness was well followed Weibull distribution. The shape parameter and the scale parameter (characteristic hardness) are increased by increasing with the applied load, as both BM and HAZ.
Keywords
Friction welded part; Vickers hardness; Base metal (BM); Heat affected zone (HAZ); Probability distribution; Weibull distribution; Variation;
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Times Cited By KSCI : 1  (Citation Analysis)
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