Assuring reliability of advanced materials in severe applications

✍ Scribed by Martin Prager

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 649 KB
• Volume: 40
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(91)90252-v

✦ Synopsis

Reliability is established through experience and subsequent adjustment (refinement) of design or processing. It would be better to be able to make quantitative predictions about performances and ultimate failure (hence, reliability) from first principles. With components of advanced materials, because they are intended for severe service, ~tio~ steps must be taken to prevent unexpected fail-.

This means that accelerated life testing (ALT) and predictive methodology must be developed beyond where we are today. These (ALT) tests must be monitored and otherwise extensively evaluated in order to support development of damage models. The challenge, then, is to develop failure models and property data which will allow for quantitative life estimation. This paper presents an overview of the state of knowledge on modeling and unders~ding failures where creep, crack propagation, fracture toughness, hydrogen effets, etc., are of concern.