Cracking of coated materials under transient thermal stresses

Journal Article · Sun Jan 01 00:00:00 EST 1989 · Journal of Thermal Stresses; (USA)

DOI:https://doi.org/10.1080/01495738908961959· OSTI ID:6965845

Rizk, A A; Erdogan, F ^[1]

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1. Lehigh Univ., Bethlehem, PA (USA)

The crack problem for a relatively thin layer bonded to a very thick substrate under thermal shock conditions is considered. The effect of surface cooling rate is studied by assuming the temperature boundary condition to be a ramp function. Among the crack geometries considered are the edge crack in the coating layer, the broken layer, the edge crack going through the interface, the undercoat crack in the substrate and the embedded crack crossing the interface. The primary calculated quantity is the stress intensity factor at various singular points and the main variables are the relative sizes and locations of cracks, the time, and the duration of the cooling ramp. The problem is solved and rather extensive results are given for two material pairs, namely a stainless steel layer welded on a ferritic medium and a ceramic coating on a steel substrate. 12 refs.

• OSTI ID: 6965845
• Journal Information: Journal of Thermal Stresses; (USA), Vol. 12:2; ISSN 0149-5739
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FERRITIC STEELS
CRACKS
STAINLESS STEELS
CERAMICS
COATINGS
COOLING
CRACK PROPAGATION
FATIGUE
GEOMETRY
STRESS ANALYSIS
STRESS INTENSITY FACTORS
THERMAL STRESSES
TRANSIENTS
ALLOYS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
MATHEMATICS
MECHANICAL PROPERTIES
STEELS
STRESSES
360103* - Metals & Alloys- Mechanical Properties