Study of Intermetallic Nanostructures for Light-Water Reactors

Jensen, Niels Grobech¹  Asta, Mark D.²  Hosemann, Peter²  Maloy, Stuart³ 

[1] Univ. of California, Davis, CA (United States);Univ. of California, Berkeley, CA (United States);Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

关键词: Mechanical characterization;    nanoindentation;    martensite;    aging;    hardening;    precipitation;   

DOI  :  10.2172/1237068
RP-ID  :  NE0000536
PID  :  OSTI ID: 1237068

学科分类：材料科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

High temperature mechanical measurements were conducted to study the effect of the dynamic precipitation process of PH 13-8 Mo maraging steel. Yield stress, ultimate tensile strength, total elongation, hardness, strain rate sensitivity and activation volume were evaluated as a function of the temperature. The dynamic changes in the mechanical properties at different temperatures were evaluated and a balance between precipitation hardening and annealed softening is discussed. A comparison between hardness and yield stress and ultimate tensile strength over a temperature range from 300 to 600 ?��C is made. The behavior of the strain rate sensitivity was correlated with the intermetallic precipitates formed during the experiments.