Neutron diffraction determination of the residual stress redistribution in cracked autofrettaged tubing

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5533577

Bourke, M A ^[1]; McGillivray, H J; Webster, G A ^[2]; Webster, P J ^[3]

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1. Los Alamos National Lab., NM (USA)
2. Imperial Coll. of Science, Technology and Medicine, London (UK). Dept. of Mechanical Engineering
3. Salford Univ. (UK). Dept. of Civil Engineering

Neutron diffraction has been used to measure the residual stress distributions in uncracked and fatigue cracked rings taken from a high strength, low alloy steel autofrettage tube with a bore diameter of 60mm and a wall thickness of 32mm. Stresses were determined to a precision of {plus minus} 10MPa. Three crack sixes were examines. No appreciable stress redistribution was observed until the crack was grown into a region which originally contained tensile residual hoop stress. When this occurred an increase in residual hoop tension was observed ahead of the crick tip. Qualitative agreement was achieved between the measured hoop stress distribution and values predicted using a boundary element method. 9 refs., 12 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5533577
• Report Number(s): LA-UR-91-1687; CONF-9103130--3; ON: DE91013688
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CARBON ADDITIONS
CHROMIUM ADDITIONS
CHROMIUM ALLOYS
COHERENT SCATTERING
CRACK PROPAGATION
DIFFRACTION
FATIGUE
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
NEUTRON DIFFRACTION
NICKEL ALLOYS
SCATTERING
STEELS
STRESS ANALYSIS
STRESSES
TENSILE PROPERTIES
TUBES