Influence of residual stresses and strains generated by cold drawing on hydrogen embrittlement of prestressing steels

2007 ◽  
Vol 49 (9) ◽  
pp. 3557-3569 ◽  
Author(s):  
J. Toribio ◽  
V. Kharin ◽  
D. Vergara ◽  
J.A. Blanco ◽  
J.G. Ballesteros
Keyword(s):  
Hydrogen Embrittlement ◽  
Residual Stresses ◽  
Cold Drawing ◽  
Residual Stresses And Strains

Variation of Residual Stresses in Drawn Copper Tubes

2008 ◽  
Vol 571-572 ◽  
pp. 21-26 ◽  
Author(s):  
Adele Carradò ◽  
D. Duriez ◽  
Laurent Barrallier ◽  
Sebastian Brück ◽  
Agnès Fabre ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Residual Stresses ◽  
Material Flow ◽  
Cold Drawing ◽  
Axisymmetric Deformation ◽  
Tube Length ◽  
Inhomogeneous Deformation ◽  
Drawing Process ◽  
Process Step ◽  
Residual Strains

Seamless tubes are used for many applications, e.g. in heating, transport gases and fluids, evaporators as well as medical use and as intermediate products for hydroforming and various mechanical applications, where the final dimensions normally are given by some cold drawing steps. The first process step – piercing of the billet, for example by extrusion or 3-roll-milling - typically results in ovality and eccentricity in the tube causing non-symmetric material flow during the cold drawing process, i.e. inhomogeneous deformation. Because of this non-axisymmetric deformation and of deviations over tube length caused by moving tools, this process step generates residual stresses. To understand the interconnections between the geometrical changes in the tubes and the residual stresses, the residual strains in a copper tube had been measured by neutron diffraction.

Susceptibility of hydrogen embrittlement of Al-alloy circular bars submitted to cold drawing

2021 ◽  
Author(s):  
Frederico Tavares ◽  
diego silva ◽  
Carlos Trivellato de Carvalho Filho ◽  
Pedro Brito
Keyword(s):  
Hydrogen Embrittlement ◽  
Cold Drawing ◽  
Al Alloy

Loading and Heating of a Simple Structure with Linear Work Hardening

1963 ◽  
Vol 67 (626) ◽  
pp. 92-102 ◽  
Author(s):  
E. H. Mansfield
Keyword(s):  
Residual Stresses ◽  
Work Hardening ◽  
Heat Load ◽  
Simple Structure ◽  
Tangent Modulus ◽  
Plastic Range ◽  
Repeated Applications ◽  
Residual Stresses And Strains

Summary:An analysis is made of the stresses and strains in a loaded two-bar tie when one of the bars is subjected to heating. The material of the bars is assumed to possess linear work hardening characteristics, i.e. a constant tangent modulus in the plastic range, and these characteristics are assumed to be independent of temperature. The following cycles of loading and heating are considered: load-heat-cool-unload, load-heat-unload-cool, heat-load-unload-cool, heat-load-cool-unload, and it is shown how, and when, these cycles produce differing stresses and strains and, in particular, differing residual stresses and strains. The effect of repeated applications of these cycles, when incremental shake-down may occur, is also considered.

Residual stresses and strains in molded plastics

1952 ◽  
Vol 7 (3) ◽  
pp. 244-252 ◽  
Author(s):  
W.H Markwood ◽  
H.M Spurlin
Keyword(s):  
Residual Stresses ◽  
Residual Stresses And Strains
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