Published March 1993 | Version v1
Journal article Metadata-only

Strength, fracture, and fatigue behavior of advanced high-temperature intermetallics reinforced with ductile phases

Creators

  • 1. Ohio State Univ., Columbus (United States)
  • 2. Univ. of California, Berkeley (United States)
  • 3. Washington Univ., St. Louis, MO (United States)

Description

The results of recent studies on the fatigue and fracture behavior of extruded Ti-48Al + 20 vol pct TiNb and hot-isostatically pressed ('hipped') MoSi2 + 20 vol pct Nb are presented (compositions in atomic percent unless stated otherwise). The effects of ductile phase reinforcement of Ti-48Al and MoSi2 on the micromechanisms of fracture under monotonic and cyclic loading are elucidated. Micromechanics models are applied to the prediction of crack-tip shielding components, and the effects of temperature on tensile/compressive/flexure strengths are discussed. Ductile phase toughening under monotonic loading conditions is shown to be associated with lower fatigue crack growth resistance. The lower fatigue resistance is attributed to the absence of crack-tip shielding, higher crack opening displacements, and the effects of inelastic strains that are developed in ductile phase-reinforced composites under cyclic loading conditions

Additional details

Publishing Information

Journal Title
Metallurgical Transactions. A, Physical Metallurgy and Materials Science
Journal Volume
24
Journal Issue
3
Journal Page Range
p. 585-600.
ISSN
0360-2133
CODEN
MTTABN

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
25008857
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
ALUMINIUM ALLOYS; COMPOSITE MATERIALS; COMPRESSION STRENGTH; CRACK PROPAGATION; DUCTILITY; EXPERIMENTAL DATA; FATIGUE; FLEXURAL STRENGTH; FRACTURE PROPERTIES; HOT WORKING; INTERMETALLIC COMPOUNDS; MATHEMATICAL MODELS; MECHANICAL PROPERTIES; MOLYBDENUM SILICIDES; NIOBIUM; NIOBIUM ALLOYS; PHASE STUDIES; REINFORCED MATERIALS; SAMPLE PREPARATION; TENSILE PROPERTIES; TITANIUM BASE ALLOYS
Descriptors DEC
ALLOYS; DATA; ELEMENTS; FABRICATION; INFORMATION; MATERIALS; MATERIALS WORKING; METALS; MOLYBDENUM COMPOUNDS; NUMERICAL DATA; SILICIDES; SILICON COMPOUNDS; TITANIUM ALLOYS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS