Probability Distribution Characteristics for Elevated Temperature Mechanical Properties of Stainless Steels

J. Ocean Eng. Technol. 2004;18(2):64-69.

스테인리스강의 고온 기계적 성질에 대한 확률분포 특성

김선진,곽명규,권상우,공유식

부경대학교 기계공학부,부경대학교 대학원 기계공학,부경대학교 대학원 기계공학,부경대학교 기계공학부

Keywords: Probability Distribution, Tensile Strength, Elongation, Acoustic Emission, Normal Distribution, Weibull Distribution, Scatter

핵심용어: 확률분포, 인장강도, 연신율, 음향방출, 정규분포, 와이벌 분포, 변동

Abstract

The characteristics of the probability distribution for mechanical properties, e.g. tensile strength, reduction of area, and elongation, for STS304 stainless steel in elevated temperature are investigated. Tensile test is performed by constant crosshead speed controls with 1mm/min. The probability distribution function of measured mechanical properties seems to follow $alpha$ 3-parameter Weibull, and shows a slight dependence on the temperature. When the temperature is raised, the shape parameter a is increased, but both the scale parameter $eta$ and location parameter v are decreased.