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Book Chapter
Internal-State Variable Modeling of Plastic Flow
Available to PurchaseSeries: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005413
EISBN: 978-1-62708-196-2
..., stage IV work hardening, and the various classes of single-phase alloys. internal-state variable modeling plastic flow stress-strain behavior polycrystal modeling face-centered cubic metals strain rate diffusion hexagonal metals work hardening IF AN ABSOLUTELY PERFECT SINGLE CRYSTAL...
Abstract
This article focuses on the analyzing and modeling of stress-strain behavior of polycrystals of pure face-centered cubic (fcc) metals in the range of temperatures and strain rates where diffusion is not important. It presents a phenomenological description of stress-strain behavior and provides information on the physical background, alternative interpretations, and directions of research. The quantitative description of strain hardening of fcc polycrystals is provided. The article also discusses the modeling of stress-strain behavior in body-centered cubic metals, hexagonal metals, stage IV work hardening, and the various classes of single-phase alloys.
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An example of burnup with plastic flow in a tapered-roller bearing. This ty...
Available to PurchasePublished: 01 January 2002
Fig. 14 An example of burnup with plastic flow in a tapered-roller bearing. This type of failure may result from loss of lubrication or gross overload. The damage begins as heat generation followed by scoring, and if the lubricant is not replenished or the load reduced, the excessive heat
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Plastic flow (top) and work hardening (bottom) of a manganese steel and an ...
Available to PurchasePublished: 01 December 1998
Fig. 4 Plastic flow (top) and work hardening (bottom) of a manganese steel and an air-hardening steel under repeat impact. Specimens 25 mm (1 in.) in both diameter and length were struck repeatedly on one end by blows with an impact energy of 680 J (500 ft·lbf). Composition and heat treatment
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Plastic flow at the contact surface of a groove ridge of S45C and generatio...
Available to PurchasePublished: 31 December 2017
Fig. 8 Plastic flow at the contact surface of a groove ridge of S45C and generation of a filmy wear particle caused by multiple passes of lubricated sliding of the mating flat and circular surface of bearing steel. Contact pressure 9.8 MPa (1.4 ksi), sliding speed 0.52 m/s (1.7 ft/s). (a) 1.6
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Plastic flow around microindentation mark on S45C flat surface caused by mu...
Available to PurchasePublished: 31 December 2017
Fig. 9 Plastic flow around microindentation mark on S45C flat surface caused by multiple passes of lubricated sliding of the mating flat and circular surface of bearing steel. Contact pressure 26.5 MPa (3.8 ksi), sliding speed 0.25 m/s (0.8 ft). (a) No passes. (b) 3.2 × 10 4 passes. (c) 4.8
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Published: 31 December 2017
Fig. 10 The amount of plastic flow (Δ D x ) at the indentation mark on S45C flat surface in relation to the number of sliding passes. Boundary oil lubrication. Source: Ref 25
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Published: 31 December 2017
Fig. 11 Plastic flow rate R x (μm/pass) to the sliding direction X , and R y (μm/pass) to the direction normal to sliding direction Y , at the indentation mark on S45C flat surface in relation to contact pressure ( P m ). Boundary oil lubrication. Source: Ref 25
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Plastic flow (top) and work hardening (bottom) of a manganese steel and an ...
Available to Purchase
in Austenitic Manganese Steels
> Properties and Selection: Irons, Steels, and High-Performance Alloys
Published: 01 January 1990
Fig. 11 Plastic flow (top) and work hardening (bottom) of a manganese steel and an air-hardening steel under repeated impact. Specimens 25 mm (1 in.) in both diameter and length were struck repeatedly on one end by blows with an impact energy of 680 J (500 ft · lbf). Composition and heat
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Published: 01 January 2000
Fig. 7 Schmid's law. τ R = ( P / A ) COS ϕ COS λ. Note: plastic flow on a given slip system will initiate when τ R > τ CRSS
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Interactions between plastic flow and forces acting during compression test...
Available to PurchasePublished: 01 January 2000
Fig. 2 Interactions between plastic flow and forces acting during compression testing. (a) Schematic of a compression test showing applied force F , radial expansion away from the centerline, and a slab element of material in a compression test. (b) Forces acting on the slab. P , pressure
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Effect of dynamic coarsening on plastic flow of Ti-6Al-4V with an equiaxed-...
Available to Purchase
in Modeling of Microstructure Evolution during the Thermomechanical Processing of Titanium Alloys
> Fundamentals of Modeling for Metals Processing
Published: 01 December 2009
Fig. 10 Effect of dynamic coarsening on plastic flow of Ti-6Al-4V with an equiaxed-alpha microstructure. Source: Ref 40 . (a) Selected flow curves. (b) Constitutive analysis to determine the appropriate activation energy and diffusivity to describe superplastic flow
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Effect of alpha platelet thickness on plastic flow of Ti-6Al-4V (with a lam...
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in Measurement and Interpretation of Flow Stress Data for the Simulation of Metal-Forming Processes
> Metals Process Simulation
Published: 01 November 2010
Fig. 19 Effect of alpha platelet thickness on plastic flow of Ti-6Al-4V (with a lamellar/acicular microstructure) at 900 °C. (a) Flow curves. (b) Hall-Petch plot for the peak flow stress, σ ¯ p . Source: Ref 34
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Plastic flow behavior of textured plate of Ti-6Al-4V with a colony (lamella...
Available to Purchase
in Measurement and Interpretation of Flow Stress Data for the Simulation of Metal-Forming Processes
> Metals Process Simulation
Published: 01 November 2010
Fig. 22 Plastic flow behavior of textured plate of Ti-6Al-4V with a colony (lamellar) alpha microstructure. (a) Stress-strain curves of samples oriented along different directions in the plate. L, longitudinal; T, long transverse; ST, short transverse. (b) Corresponding inverse pole figure
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Flow stress as a function of (a) plastic work or (b) plastic strain for an ...
Available to PurchasePublished: 01 January 2006
Fig. 6 Flow stress as a function of (a) plastic work or (b) plastic strain for an aluminum alloy 6111-T4 sheet sample measured in balanced biaxial tension (bulge test) and uniaxial tension for directions at every 15° from the rolling direction. (c) Fit of Voce law to bulge-test data over two
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Published: 01 January 2006
Fig. 5 Flow stresses at equivalent amount of plastic work in uniaxial tension, W u p , and balanced biaxial tension (bulge test), W b p , i.e., for W o p = W u p
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Temperature dependence of flow stresses for equivalent true plastic strain ...
Available to Purchase
in Austenitic Manganese Steels
> Properties and Selection: Irons, Steels, and High-Performance Alloys
Published: 01 January 1990
Fig. 18 Temperature dependence of flow stresses for equivalent true plastic strain ε p , of 0.002, 0.04, 0.08, 0.16, and 0.24. Source: Ref 16
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Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002485
EISBN: 978-1-62708-194-8
... in applying a deformation process. Some fundamental aspects of plastic flow, flow stress, cold and hot working, workability, and formability are presented. The article provides information on free-surface cracking, central burst or chevron cracking, and cracking on die contact surface, as well...
Abstract
This article introduces the reasons behind the selection of a deformation process as the method of choice for producing a part or product form. It discusses the advantages, disadvantages, and categories of deformation processes. The article describes the major design considerations in applying a deformation process. Some fundamental aspects of plastic flow, flow stress, cold and hot working, workability, and formability are presented. The article provides information on free-surface cracking, central burst or chevron cracking, and cracking on die contact surface, as well as the microstructural effects on metal flow. It also discusses the defects in sheet-metal formed parts and flow-related defects in bulk forming.
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005147
EISBN: 978-1-62708-186-3
... includes the characterization of plastic flow, internal cavitation, and fracture behavior. Processing variables needed for the overall characterization of superplastic behavior are summarized. The article discusses the superplastic forming methods, namely, blow forming, vacuum forming, thermoforming, deep...
Abstract
This article discusses many of the processes and related considerations involved in the forming of superplastic sheet metal parts. It reviews the requirements for superplasticity and describes the characteristics of superplastic metals. The characterization of superplastic behavior includes the characterization of plastic flow, internal cavitation, and fracture behavior. Processing variables needed for the overall characterization of superplastic behavior are summarized. The article discusses the superplastic forming methods, namely, blow forming, vacuum forming, thermoforming, deep drawing, superplastic forming/diffusion bonding, forging, extrusion, and dieless drawing. It provides information on superelastic forming equipment and tooling. The article explains the thinning characteristics and quick plastic forming and its technological elements. It describes the manufacturing practice of the process. The article concludes with a discussion on the superplastic behavior in iron-base alloys.
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006394
EISBN: 978-1-62708-192-4
... Abstract Current understanding of polishing wear involves a combination of abrasive, plastic flow, and tribochemical wear. This article explains these mechanisms and the correlation between them. Some explanations about practical polishing wear control, applications, and future prospects...
Abstract
Current understanding of polishing wear involves a combination of abrasive, plastic flow, and tribochemical wear. This article explains these mechanisms and the correlation between them. Some explanations about practical polishing wear control, applications, and future prospects are also given. This article discusses the influence of size and number of wear particles on polishing at three abrasive wear modes. These include cutting, wedge forming, and plowing. The article concludes with information on applications and prospects of polishing wear control.
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009002
EISBN: 978-1-62708-185-6
... working and key processes that control microstructure evolution: dynamic recovery, static recovery, recrystallization, and grain growth. Some of the key phenomenological descriptions of plastic flow and microstructure evolution are also summarized. The article concludes with a discussion on the modeling...
Abstract
This article reviews the general aspects of microstructure evolution during thermomechanical processing. The effect of thermomechanical processing on microstructure evolution is summarized to provide insight into the aspect of process design. The article provides information on hot working and key processes that control microstructure evolution: dynamic recovery, static recovery, recrystallization, and grain growth. Some of the key phenomenological descriptions of plastic flow and microstructure evolution are also summarized. The article concludes with a discussion on the modeling of microstructure evolution.
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