[A microstructural approach to fatigue crack processes in poly crystalline BCC materials]

Technical Report · Tue Dec 31 23:00:00 EST 1991

DOI:https://doi.org/10.2172/6345356· OSTI ID:6345356

Gerberich, W W

Objective was to study fatigue where a combination of low temperature and cyclic loading produced cyclic cleavage in bcc Fe-base systems. Both dislocation dynamics and quasi-statics of crack growth were probed. This document reviews progress over the past 6 years: hydrogen embrittlement and cleavage, computations (stress near crack tip), dislocation emission from grain boundaries, fracture process zones, and understanding brittle fracture at the atomistic/dislocation scales and at the microscopic/macroscopic scale.

• Research Organization: Minnesota Univ., Minneapolis, MN (United States). Dept. of Chemical Engineering and Materials Science
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-84ER45141
• OSTI ID: 6345356
• Report Number(s): DOE/ER/45141-9; ON: DE93016666
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
BCC LATTICES
CRACK PROPAGATION
CRYSTAL DEFECTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DISLOCATIONS
DOCUMENT TYPES
DUCTILE-BRITTLE TRANSITIONS
EMBRITTLEMENT
FAILURES
FATIGUE
FRACTURES
GRAIN BOUNDARIES
HYDROGEN EMBRITTLEMENT
IRON ALLOYS
IRON BASE ALLOYS
LINE DEFECTS
MECHANICAL PROPERTIES
MICROSTRUCTURE
PROGRESS REPORT
ZONES