Constant Load SCC Initiation Response of Alloy 22 (UNS N06022), Titanium Grade 7 and Stainless Steels at 105C

Young, L.M. ; Catlin, G.M. ; Andresen, P.L. ; Gordon, G.M.

United States. Department of Energy. Yucca Mountain Project Office.

关键词: Welding;    Aging;    Alloys;    36 Materials Science;    Yucca Mountain;   

DOI  :  10.2172/808012
RP-ID  :  NONE
RP-ID  :  NONE
RP-ID  :  808012

美国|英语

来源: UNT Digital Library

【 摘 要 】

This paper provides an update on research addressing the effects of material condition and applied stress on stress corrosion cracking (SCC) in waste package and drip shield materials for the Yucca Mountain Project. Time-to-failure experiments are being performed on smooth bar tensile specimens in a hot, concentrated, mixed-salt solution chosen to simulate concentrated Yucca Mountain water. The effects of applied stress, welding, surface finish, shot peening, cold work, crevicing, and aging treatment are being investigated for Alloy 22 (UNS N06022). Aging treatments were designed to produce topologically close-packed phases (TCP) and long-range ordering (LRO) and are under investigation as worse-case scenarios for possible microstructures in Alloy 22 (UNS N06022). Titanium Grade 7 and 3 16NG stainless steel are included in the matrix, as they are identified for drip shield and waste package components, respectively. Sensitized 304SS specimens are included in the test matrix to provide benchmark data. This research complements high-resolution crack-growth-rate experiments currently being performed in a parallel research project.