☆ 4.7 Article

Nonlinear unloading-reloading behavior and macro/micro models during multi-pass cyclic hot compression of aluminum alloys

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING (2023)

Related references

Note: Only part of the references are listed.

Article Engineering, Mechanical

Experimental characterization and crystal plasticity modeling for predicting load reversals in AA6016-T4 and AA7021-T79

Sowmya Daroju et al.

Summary: The contribution of microstructural-level phenomena to reverse loading behavior in metal alloys is still an active and debated area of research. Accurate prediction of nonlinear effects, the Bauschinger effect, and changes in hardening rates during reverse loading is necessary for modeling deformation and springback in forming operations. This study applied a crystal plasticity model to predict and interpret reverse loading in two aluminum alloys, revealing the contribution of different microscale phenomena.

INTERNATIONAL JOURNAL OF PLASTICITY (2022)

Add to Collection

Article Engineering, Mechanical

In-situ high-energy X-ray diffraction and crystal plasticity modeling to predict the evolution of texture, twinning, lattice strains and strength during loading and reloading of beryllium

Nicholas C. Ferreri et al.

Summary: In this study, the deformation behavior of beryllium during compressive loading and cross-reloading is investigated using experimental measurements and crystal plasticity modeling. The comparison between experimental data and model predictions reveals that the shifts in active deformation mechanisms are primarily responsible for drastic changes in the flow stress.

INTERNATIONAL JOURNAL OF PLASTICITY (2022)

Add to Collection

Article Engineering, Mechanical

Size effect on nonlinear unloading behavior and Bauschinger effect of Ni-based superalloy ultrathin sheet

Weilin He et al.

Summary: The size effect of superalloy ultrathin sheet affects its nonlinear unloading behavior and Bauschinger effect. Increasing grain size decreases the flow stress and density of forest dislocation and moving dislocation in superalloy ultrathin sheet, and also leads to more evident degradation of elastic modulus. The Bauschinger effect and the variations of permanent softening and work-hardening stagnation in superalloy ultrathin sheet are influenced by the t/d ratio.

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES (2022)

Add to Collection

Article Engineering, Mechanical

Complex unloading behavior of titanium alloy in cold and thermal-mechanical working

J. Ma et al.

Summary: This research investigates the complex unloading behavior in thermal-mechanical processes using a near-alpha high-strength titanium alloy. The study reveals the temperature-dependent degradation of elastic modulus and nonlinear stress-strain response, and develops a physically-based model to reproduce the nonlinear reduction effect of elastic modulus. The model includes the reversible mobile dislocation density to describe the evolving nonlinear elastic strain component. The research provides insights into the mechanism of complex unloading nonlinearity in thermal-mechanical working.

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES (2022)

Add to Collection

Article Engineering, Industrial

Analysis of springback for multiple bending considering nonlinear unloading-reloading behavior, stress inheritance and Bauschinger effect

Qingdang Meng et al.

Summary: A new analytical model considering stress inheritance, the Bauschinger effect, and nonlinear unloading-reloading behavior was established to accurately predict springback in difficult-to-form metals. Experimental verification showed good agreement between the analytical results and experimental results, with an average relative error within 3% for the 6061 aluminum alloy rectangular section beam. The analytical model established in this study has higher prediction accuracy and faster solution speed compared to existing models.

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY (2022)

Add to Collection

Article Materials Science, Multidisciplinary

Tension-compression asymmetry of grain-boundary sliding: A molecular dynamics study

Xiaotao Li et al.

Summary: The tension-compression asymmetry mechanisms of grain boundary sliding were studied through molecular dynamics simulations. The results indicate that compressive stress inhibits grain boundary sliding, while tensile stress promotes it. The pressure-dependent behavior of grain boundary sliding is attributed to the tension-compression asymmetry of local shear events in grain boundaries, similar to shear banding in metallic glasses, as well as a novel strengthening mechanism of compression-induced grain boundary bending that increases the plastic flow stress.

MATERIALS LETTERS (2022)

Add to Collection

Article Metallurgy & Metallurgical Engineering

Unloading behaviors of the rare-earth magnesium alloy ZE10 sheet

Weiqin Tang et al.

Summary: The unloading behaviors of the rare-earth magnesium alloy ZE10 sheet were studied using mechanical tests and crystal plasticity modeling. The study found significant anisotropy and loading path dependency in the unloading behaviors of ZE10 sheets. Inelastic strains varied under different loading conditions, with basal slip, twinning, and de-twinning being responsible for the behaviors.

JOURNAL OF MAGNESIUM AND ALLOYS (2021)

Add to Collection

Article Materials Science, Multidisciplinary

The nature of yielding and anelasticity in metals

Dayong Li et al.

Summary: Recent literature reports have identified pre-yield stress-strain nonlinearity and hysteresis (anelasticity) occurring in metals at virtually all stresses. A finite yield stress was found to exist following prestrain, below which no permanent deformation or hardening occurs. Anelasticity is distinct from elasticity and plasticity, being recoverable and dissipative.

ACTA MATERIALIA (2021)

Add to Collection

Article Materials Science, Multidisciplinary

Quantifying internal strains, stresses, and dislocation density in additively manufactured AlSi10Mg during loading-unloading-reloading deformation

X. X. Zhang et al.

Summary: In-situ neutron diffraction was used to investigate the residual strains, stresses, and dislocation density in LPBF AlSi10Mg during loading-unloading-reloading deformation. The study revealed that the AlSi10Mg alloy exhibits notable dislocation annihilation phenomenon in the Al matrix during unloading stages, driven by compressive residual stresses.

MATERIALS & DESIGN (2021)

Add to Collection

Article Materials Science, Multidisciplinary

Stress relaxations during cyclic loading-unloading in precipitation hardened Mg-4.5Zn

Jun Wang et al.

Summary: The study investigates the impact of aging on cyclic loading-unloading responses of extruded Mg-Zn alloys, revealing that aging has complex effects on twinning and slip behavior. Aged samples promote twinning over slip during loading and experience additional 'forward' twinning upon unloading. Furthermore, aging leads to noticeable ratchetting strain compared to non-aged samples.

ACTA MATERIALIA (2021)

Add to Collection

Article Engineering, Industrial

Nonlinear anelastic behavior and unloading-reloading constitutive models of severe plastic compressive deformation

Hongli Hou et al.

Summary: The study focused on the nonlinear anelastic behavior in unloading and unloading-reloading processes of severe plastic compressive deformation (SPCD) in hot-rolled copper plates along different directions. Experimental tests were conducted to analyze the unloading behavior, variation law of anelastic strain, and the effect of anisotropy. Models were established at micro and macro levels to accurately predict the anelastic strain and stress-strain relationship in SPCD.

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY (2021)

Add to Collection

Article Engineering, Mechanical

Modelling of Springback in Tube Bending: A Generalized Analytical Approach

J. Ma et al.

Summary: This research presents a generalized analytical solution for springback in tube bending, enabling accurate and efficient analysis of springback for bending of general tubular materials, in particular, for the tubes with tension-compression asymmetry. By taking the rotary draw bending of high-strength titanium tubes as a case study, the developed analytical model was carefully evaluated, showing its good efficiency for springback prediction - particularly for the large-angle (>= 90 deg.) forming cases.

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES (2021)

Add to Collection

Article Engineering, Industrial

Springback behavior and a new chord modulus model of copper alloy during severe plastic compressive deformation

Hongli Hou et al.

Summary: The study investigates the springback behavior of copper alloy after SPCD, revealing the effects of strain hardening, strain softening, and anisotropy on springback behavior. A new chord modulus model and 1-D ET model in a power exponential form were proposed to accurately predict the chord modulus and springback strain after SPCD. Results showed significant differences in springback behavior between SPCD and small plastic compressive deformation.

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY (2021)

Add to Collection

Article Nanoscience & Nanotechnology

Dynamic and static softening mechanisms of commercial-purity Zr during double-stage hot compressive deformation

Qingjuan Wang et al.

Summary: The study showed that at 600°C, the peak stress of Zr was higher in the second stage than the single-stage test, without static softening; at 800°C, the peak stress was lower than the single-stage test, with rapid static softening occurring; at 700°C, the peak stress of the second stage decreased gradually with increasing holding time.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING (2021)

Add to Collection

Article Nanoscience & Nanotechnology

Cyclic deformation and fatigue behavior of 7075-T651 Al alloy with a gradient structure

Zepeng Liu et al.

Summary: The fully reversed stress-controlled tension-compression fatigue experiments were conducted to study the cyclic deformation and fatigue behavior of 7075-T651 aluminum alloys with and without a surface mechanical rolling treatment (SMRT). Results showed that SMRT significantly increased the fatigue strengths of the alloys, but also led to more remarkable ratcheting effects and tension-compression asymmetry in the fatigue specimens. Additionally, a failure-mode transition from intrusions and extrusions to the Al18Ti2Mg3 constituent phase was observed in both base metal and SMRT specimens.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING (2021)

Add to Collection

Article Nanoscience & Nanotechnology

Tension-compression asymmetry of stress-relaxation ageing behavior of AA2219 alloy over a wide range of stress levels

Youliang Yang et al.

Summary: The study investigated the asymmetric stress-relaxation aging behavior of AA2219 alloy under tension and compression loading conditions. It was found that the relaxed stresses in tension are significantly larger than those in compression, mainly due to the initial rapid reduction stage of stress relaxation. The yield strength in tension increases monotonously with increasing initial stress levels, while it remains relatively unchanged in compression.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING (2021)

Add to Collection

Article Engineering, Mechanical

Polycrystal plasticity modeling for load reversals in commercially pure titanium

Jiaxiang Wang et al.

INTERNATIONAL JOURNAL OF PLASTICITY (2020)

Add to Collection

Article Engineering, Mechanical

Model for description of nonlinear unloading-reloading stress-strain response with special reference to plastic-strain dependent chord modulus

Fusahito Yoshida et al.

INTERNATIONAL JOURNAL OF PLASTICITY (2020)

Add to Collection

Article Nanoscience & Nanotechnology

Static softening behavior and modeling of an Al-Cu-Mg-Zr alloy with various pre-precipitation microstructures during multistage hot deformation

Guowei Bo et al.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING (2020)

Add to Collection

Article Mechanics

Plastic bending of sheet metal with tension/compression asymmetry

Kanghwan Ahn

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES (2020)

Add to Collection

Article Engineering, Mechanical

Integrated physically based modeling for the multiple static softening mechanisms following multi-stage hot deformation in Al-Zn-Mg-Cu alloys

Jie Tang et al.

INTERNATIONAL JOURNAL OF PLASTICITY (2020)

Add to Collection

Article Engineering, Mechanical

Local stress and strain in heterogeneously deformed aluminum: A comparison analysis by microhardness, electron microscopy and finite element modelling

Xiaodan Zhang et al.

INTERNATIONAL JOURNAL OF PLASTICITY (2019)

Add to Collection

Article Mechanics

On the nonlinear anelastic behavior of AHSS

A. Torkabadi et al.

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES (2018)

Add to Collection

Article Engineering, Mechanical

Study of springback effect of AHS steels using a microstructure based modeling

W. Julsri et al.

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES (2018)

Add to Collection

Article Engineering, Manufacturing

Experimental and finite element analysis on oscillating cold forming in consideration of nonlinear loading-unloading-reloading behavior

Ning-yu Ben et al.

JOURNAL OF MANUFACTURING PROCESSES (2018)

Add to Collection

Article Engineering, Mechanical

Piecewise linear approximation of nonlinear unloading-reloading behaviors using a multi-surface approach

Jeong-Yeon Lee et al.

INTERNATIONAL JOURNAL OF PLASTICITY (2017)

Add to Collection

Article Materials Science, Multidisciplinary

Quantification of dislocation structures from anelastic deformation behaviour

Zaloa Arechabaleta et al.

ACTA MATERIALIA (2016)

Add to Collection

Article Engineering, Mechanical

Modeling of tension-compression asymmetry and orthotropy on metallic materials: Numerical implementation and validation

P. D. Barros et al.

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES (2016)

Add to Collection

Article Engineering, Mechanical

Experimental assessment of nonlinear elastic behaviour of dual-phase steels and application to springback prediction

Xin Xue et al.

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES (2016)

Add to Collection

Article Nanoscience & Nanotechnology

A physically based yield criterion I. Determination of the yield stress based on analysis of pre-yield dislocation behaviour

Peter van Liempt et al.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING (2016)

Add to Collection

Article Engineering, Mechanical

A dislocation density based elasto-plastic self-consistent model for the prediction of cyclic deformation: Application to AA6022-T4

Milovan Zecevic et al.

INTERNATIONAL JOURNAL OF PLASTICITY (2015)

Add to Collection

Article Engineering, Industrial

Control of thermal contraction of aluminum alloy for precision cold forging

T. Ishikawa et al.

CIRP ANNALS-MANUFACTURING TECHNOLOGY (2014)

Add to Collection

Article Materials Science, Multidisciplinary

In situ TEM observations of reverse dislocation motion upon unloading in tensile-deformed UFG aluminium

Frederic Mompiou et al.

ACTA MATERIALIA (2012)

Add to Collection

Article Nanoscience & Nanotechnology

Effect of concurrent recovery on Avrami exponent of the softening kinetics after hot deformation

Haiwen Luo

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING (2012)

Add to Collection

© Peeref 2019-2024. All rights reserved.