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

Abstract

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.

Authors:
Publication Date:
Research Org.:
Louisiana State Univ. and Agricultural and Mechanical Coll., Baton Rouge, LA (USA)
OSTI Identifier:
5673859
Resource Type:
Thesis/Dissertation
Resource Relation:
Other Information: Thesis (Ph. D.)
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Rasty, J. Experimental and finite-element study of residual stresses in Zircaloy-4(R) and OFHC copper tubes. United States: N. p., 1987. Web.
Rasty, J. Experimental and finite-element study of residual stresses in Zircaloy-4(R) and OFHC copper tubes. United States.
Rasty, J. 1987. "Experimental and finite-element study of residual stresses in Zircaloy-4(R) and OFHC copper tubes". United States.
@article{osti_5673859,
title = {Experimental and finite-element study of residual stresses in Zircaloy-4(R) and OFHC copper tubes},
author = {Rasty, J},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/5673859}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1987},
month = {Thu Jan 01 00:00:00 EST 1987}
}

Thesis/Dissertation:
Other availability
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