Density change in an austenitic stainless steel deformed in tension or compression

Garofalo, F.; Wriedt, H. A.

doi:10.1016/0001-6160(62)90069-x

Cited by 43 publications

(10 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, dislocation density plays a significant role on brittle to ductile transition, fatigue, hardness, work hardening, and plastic behavior of metals and alloys [5][6][7][8]. Furthermore, dislocations have considerable effect on physical properties of metals such as density [9][10][11][12], thermal conductivity [13,14], and electrical resistivity [9,13,14].…”

Section: Introductionmentioning

confidence: 99%

An Investigation on Dislocation Density in Cold-Rolled Copper Using Electrochemical Impedance Spectroscopy

et al. 2013

View full text Add to dashboard Cite

Variation of electrochemical impedance with dislocation density was investigated using electrochemical impedance spectroscopy (EIS). For this purpose, EIS measurements were carried out on 10, 20, 30, 40, and 50% cold-rolled commercially pure copper in 0.1 M NaCl (pH = 2) solution. Nyquist plots illustrated that the electrochemical reactions are controlled by both charge transfer and diffusion process. Increasing dislocation density, the magnitude of electrochemical impedance of samples was decreased. Decreasing magnitude of impedance at intermediate frequencies indicated increasing double-layer capacitance. Charge transfer resistance decreased from value 329.6 Ωcm 2 for annealed sample to 186.3 Ωcm 2 for sample with maximum dislocation density (1.72 × 10 15 m −2 ). Phase angles were lower for samples that contained more dislocation density, indicating more tendencies to loss of electrons and releasing atoms into electrolyte.

show abstract

Section: Introductionmentioning

confidence: 99%

An Investigation on Dislocation Density in Cold-Rolled Copper Using Electrochemical Impedance Spectroscopy

et al. 2013

View full text Add to dashboard Cite

show abstract

“…The volume variation due to chemical reactions, phase changes and other phenomena, such as the change of the average size of crystal grains in a polycrystal, is easily perceived. Moreover, it is experimentally proven that the production of anisotropy during deformation involves increase of bulk density (see, for instance, [27,28]) and that the spontaneous reduction of strain anisotropy, artificially enhanced by heating the deformed object, involves the opposite density change (see, for instance, [29]). …”

Section: Discussionmentioning

confidence: 99%

“…is analogous to the vector space with the metric tensor (27). However, this does not mean that the components of strain by internal rotation correspond to the components of internal reactions counterbalancing couples acting on the deforming volume element.…”

Section: Internal Reactions To the External Actions Within A Homogenementioning

confidence: 99%

Relating Deformation and Thermodynamics: An Opportunity for Rethinking Basic Concepts of Continuum Mechanics

Guzzetta¹

2013

Entropy

View full text Add to dashboard Cite

In order to treat deformation as one of the processes taking place in an irreversible thermodynamic transformation, two main conditions must be satisfied: (1) strain and stress should be defined in such a way that the modification of the symmetry of these tensorial quantities reflects that of the structure of the actual material of which the deforming ideal continuum is the counterpart; and (2) the unique decomposition of the above tensors into the algebraic sum of an isotropic and an anisotropic part with different physical meanings should be recognized. The first condition allows the distinction of the energy balance in irrotational and rotational deformations; the second allows the description of a thermodynamic transformation involving deformation as a function of both process quantities, whose values depend on the specific transition, or path, between two equilibrium states, and of state quantities, which describe equilibrium states of a system quantitatively. One of the main conclusions that can be drawn is that, dealing with deformable materials, the quantities that must appear in thermodynamic equations cannot be tensorial quantities, such as the stress tensor and the infinitesimal or finite strain tensor usually considered in continuum mechanics (or, even worse, their components). The appropriate quantities should be invariants involved by the strain and stress tensors here defined. Another important conclusion is that, from a thermodynamic point of view, the consideration of the measurable volume change occurring in an isothermal deformation does not itself give any meaningful information.

show abstract

“…The weight of the specimen ranged between 0.8 and 6.2 g. The scale had a precision of 710 À 4 g. The specimen mass was weighed in air, m air , and in liquid, m liquid , according to the process described by Garofalo and Wriedt [15]. The liquid was limonene with table density r¼0.8411 g/cm 3 .…”

Section: Density Measurementsmentioning

confidence: 99%

“…Spitzig and Richmond [12] note that the small volume change that was detected corresponded to the dislocation volume that develops during plastic deformation. Garofalo and Wriedt [15] measured carefully the density change of plastically deformed austenitic steel with only marginal SDE and find that only a portion of the bulk density change could be due to dislocations. The remainder is ascribed to the generation of microcracks.…”

Section: Introductionmentioning

confidence: 99%

Elastic–plastic characterization of a high strength bainitic roller bearing steel—experiments and modelling

Arregui

Alfredsson

2010

International Journal of Mechanical Sciences

View full text Add to dashboard Cite

Density change in an austenitic stainless steel deformed in tension or compression

Cited by 43 publications

References 6 publications

An Investigation on Dislocation Density in Cold-Rolled Copper Using Electrochemical Impedance Spectroscopy

An Investigation on Dislocation Density in Cold-Rolled Copper Using Electrochemical Impedance Spectroscopy

Relating Deformation and Thermodynamics: An Opportunity for Rethinking Basic Concepts of Continuum Mechanics

Elastic–plastic characterization of a high strength bainitic roller bearing steel—experiments and modelling

Contact Info

Product

Resources

About