Experimental and finite-element study of residual stresses in Zircaloy-4(R) and OFHC copper tubes

Thesis/Dissertation · Thu Jan 01 00:00:00 EST 1987

OSTI ID:5673859

Rasty, J

Nonhomogeneous plastic deformation associated with metal-forming operations results in a state of residual stress in the final product. In the experimental phase of this study, residual stress distribution in Zr-4(R) and copper tubes is determined by electropolishing the outer (or inner) and surface of the tubes while measuring the developed strains at the inner (or outer) surface. Material removal by electropolishing proved to be an efficient and suitable technique due to its constant mass removal rate under conditions which do not alter the patter of residual stresses in the specimen. In the case of Zr-4(R) specimens, experiments were conducted on the as-received (stress relieved) as well as specimens annealed at 500 C for one hour. The effect of various degrees of cold working on the residual stress patterns of drawn copper tubing is determined by performing similar experiments on soft, 1/4-hard, 1/2-hard, and hard temper, OFHC copper specimens. In the second phase of this investigation, an elastic-plastic finite-element code (ABAQUS) is employed in a parametric study to determined the optimum processing conditions for drawing copper tubes.

• Research Organization: Louisiana State Univ. and Agricultural and Mechanical Coll., Baton Rouge, LA (USA)
• OSTI ID: 5673859
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER
TUBES
FINITE ELEMENT METHOD
RESIDUAL STRESSES
MEASURING METHODS
ZIRCALOY 4
ANNEALING
COLD WORKING
PARAMETRIC ANALYSIS
ALLOY-ZR98SN-4
ALLOYS
CHROMIUM ADDITIONS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
ELEMENTS
FABRICATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HEAT TREATMENTS
IRON ADDITIONS
IRON ALLOYS
MATERIALS
MATERIALS WORKING
METALS
NUMERICAL SOLUTION
STRESSES
TIN ALLOYS
TRANSITION ELEMENTS
ZIRCALOY
ZIRCONIUM ALLOYS
ZIRCONIUM BASE ALLOYS
360101* - Metals & Alloys- Preparation & Fabrication
360103 - Metals & Alloys- Mechanical Properties