Using Designed Residual Stress Profiles to Produce Flaw-Tolerant Glass

Conference · Thu Sep 02 00:00:00 EDT 1999

OSTI ID:12714

BEAUCHAMP, E K; GLASS, S JILL; GREEN, D J; SGLAVO, M

A processing approach has been identified and reduced to practice in which a residual stress profile can be designed such that cracks in a brittle material are arrested or grow in a stable fashion. In the procedure, cracks in the body encounter an increase in the magnitude of residual compression as the crack propagates. If correctly designed, the process increases strength, significantly decreases strength variability and gives rise to multiple cracking. This approach is demonstrated for an ion-exchanged silicate glass using four-point and biaxial flexure strength testing. Optical microscopy was used to study the morphology and development of the multiple cracking that precedes the final failure.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 12714
• Report Number(s): SAND99-0303C; TRN: AH200120%%402
• Resource Relation: Conference: Fracture Mechanics of Ceramics Conference, Moscow (RU), 07/20/1999--07/22/1999; Other Information: PBD: 2 Sep 1999
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPRESSION
FRACTURE MECHANICS
GLASS
MORPHOLOGY
RESIDUAL STRESSES
CRACK PROPAGATION
FLEXURAL STRENGTH