| An improved methodology for determining tensile design strengths of Alloy 617
Woo-Gon Kim*, Song-Nan Yin, Ji-Yeon Park, Sung-Deok Hong and Yong-Wan Kim
The Journal of Mechanical Science and Technology, vol. 26, no. 2, pp.379-387, 2012
Abstract : This paper presents an improved methodology for determining high-temperature tensile design strengths of Alloy 617, which is regarded
as one of main structural materials for very high temperature reactor (VHTR) system. In establishing time-independent allowable
stress values, an existing ASME standard procedure is preliminarily analyzed and their limitations are pointed out. Then, an improved
methodology, which has a consistent and quantifiable design margin at low and high temperatures for tensile strengths, is proposed and
compared with the ASME method. To find suitable curves of temperature trend to the tensile strength data, three fitting methods are
demonstrated, and a statistical technique is adopted for design use. The results will be utilized to reasonably determine the tensile design
strengths of Alloy 617 for application in the VHTR system.
Keyword : Yield strength; Ultimate tensile strength; Alloy 617; Very high temperature reactor |
