Draft ASME Boiler and Pressure Vessel Code Section III, Division 5, Section HB, Subsection B, Code Case for Alloy 617 and Background Documentation

Wright, Julie Knibloe¹ 

[1] Idaho National Lab. (INL), Idaho Falls, ID (United States)

关键词: Advanced Reactor Technology;    ASME;    Boiler and Pressure Vessel;    Very High Temperature Reactor;   

DOI  :  10.2172/1245056
RP-ID  :  INL/EXT--15-36305
PID  :  OSTI ID: 1245056

学科分类：材料科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

Alloy 617 is the leading candidate material for an intermediate heat exchanger for the very high temperature reactor. To evaluate the behavior of this material in the expected service conditions, strain controlled cyclic tests that include long hold times up to 240 minutes at maximum tensile strain were conducted at 850?��C. In terms of the total number of cycles to failure, the fatigue resistance decreased when a hold time was added at peak tensile strain. Increases in the tensile hold duration degraded the creep fatigue resistance, at least to the investigated strain controlled hold time of up to 60 minutes at the 0.3% strain range and 240 minutes at the 1.0% strain range. The creep fatigue deformation mode is considered relative to the lack of saturation, or continually decreasing number of cycles to failure with increasing hold times. Additionally, preliminary values from the 850?��C creep fatigue data are calculated for the creep fatigue damage diagram and have higher values of creep damage than those from tests at 950?��C.