An improved methodology for determining tensile design strengths of Alloy 617

作者：Kim Woo Gon^*; Yin Song Nan; Park Ji Yeon; Hong Sung Deok; Kim Yong Wan

来源：Journal of Mechanical Science and Technology, 2012, 26(2): 379-387.

DOI：10.1007/s12206-011-1024-5

• Yield strength
• Ultimate tensile strength
• Alloy 617
• Very high temperature reactor

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.

• 出版日期2012-2