Plant life extension and reliability issues

Walter G. Reuter; Allen M. Porter; Nancy M. Carlson

doi:10.1117/12.209365

12 May 1995 Plant life extension and reliability issues

Walter G. Reuter, Allen M. Porter, Nancy M. Carlson

Proceedings Volume 2454, Nondestructive Evaluation of Aging Utilities; (1995) https://doi.org/10.1117/12.209365
Event: Nondestructive Evaluation of Aging Infrastructure, 1995, Oakland, CA, United States

Abstract

Thermal embrittlement, which can occur during normal operating conditions, may reduce the fracture toughness of materials to the point that structural integrity becomes suspect. Much of the data reported in the literature is based on using impact energy to quantify the extent of embrittlement experienced by base metal specimens. These data provide a useful, qualitative description of the embrittlement but are of limited use in predicting structural integrity when there are cracks in the base metal or in weldments. This paper presents fracture toughness data for both base metal and weldments exposed at 649 degrees Celsius for times up to 5000 h. In addition, preliminary results are provided regarding the use of nondestructive examination (NDE) techniques to predict changes in fracture toughness.

Citation Download Citation

Walter G. Reuter, Allen M. Porter, and Nancy M. Carlson "Plant life extension and reliability issues", Proc. SPIE 2454, Nondestructive Evaluation of Aging Utilities, (12 May 1995); https://doi.org/10.1117/12.209365

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