Abstract
The objective of the Stress-Corrosion Cracking (SCC) Phase of the NG-18 program is to develop an understanding of the causes of external SCC and methods of controlling it on new and existing gas transmission pipelines. An overview of past and proposed NG-18 programs designed to address this objective is given in Figure 1 in the Introduction Section, where it can be seen that the research has been divided into two categories, SCC mitigation and life estimation. The research carried out in 1985 at BCD focused on several areas under these categories: (1) the development of resistant steels and surfaces, and (2) the development of a crack growth/life prediction model. In the former, three experimental tasks were carried out in 1985, deformation response behavior, grain boundary chemistry, and surface effects. In the latter, a preliminary investigation of slip related models for describing SCC was carried out. Accomplishments on these tasks are described below.
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L51517 Stress Corrosion Cracking Research
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