A mechanism-dependent material model for the effects of grain growth and anisotropy on plastic deformation of magnesium alloy AZ31 sheet at 450°C

Carpenter, Alexander J.; Antoniswamy, Aravindha R.; Carter, Jon T.; Hector, Louis G.; Taleff, Eric M.

doi:10.1016/j.actamat.2014.01.043

Cited by 35 publications

(6 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In other words, 𝑚𝑚 * is the slope of the hyperbolic sine function for low stress values and can be then related to the sensitivity index. This same development can be followed with identical result for (10).…”

Section: Methodsmentioning

confidence: 68%

“…In order to match the material behavior over a wider strain-rate range, different constitutive models have historically been proposed: polynomial forms [8], unified constitutive equations including microstructure evolution models [2,9] or anisotropy plus grain size models [10]. [11] can be consulted for a summary of different constitutive models.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparative studies of hyperbolic sine constitutive models for constant pressure superplastic tests

García-Barrachina

2023

Superplasticity in Advanced Materials

View full text Add to dashboard Cite

Abstract. The constant pressure free-inflation test is a very versatile and simple tool for analyzing different features of superplastic forming. In recent years, different methods have been proposed to measure constitutive parameters of the stress–strain relationship for the superplastic material, specifically the K and m parameters of the power law model. However, this law is restricted to be used in narrow strain-rate ranges, and poor results are obtained when applied in a broader spectrum. To overcome this problem, numerous constitutive models covering the full strain-rate range applicable in superplastic forming have been proposed historically, including the hyperbolic sine equation. However, there is no clear consensus on the type of hyperbolic sine function to use. Some authors include a sensitivity parameter while others do not. This article aims to study the characteristics of the hyperbolic sine constitutive model, checking which of the historically proposed models achieves better results in the test at free deformation and constant pressure.

show abstract

Section: Methodsmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Comparative studies of hyperbolic sine constitutive models for constant pressure superplastic tests

García-Barrachina

2023

Superplasticity in Advanced Materials

View full text Add to dashboard Cite

show abstract

“…In contrast to uniaxial tests, biaxial tests haven been applied not only for determining material parameters but also for evaluating new constitutive models [4] and optimising relevant parameters of the process [5]. Other authors have previously developed different methodologies based on freebulge tests in order to determine the superplastic material constants [6,7,8].…”

Section: Introductionmentioning

confidence: 99%

Superplastic Materials Characterisation Based on Free-Bulge Tests

García-Barrachina

Gámez

2020

SSP

View full text Add to dashboard Cite

A new characterisation method based on free-bulge tests is proposed to find the characteristic parameters of the strainstress relation in superplastic alloys. The method is applied to experimental tests found in the literature and to new adhoc tests performed on aluminium, magnesium and titanium alloys. The parameters are then compared to independent values obtained from tensile test and computer-aided simulations. The characterisation of the material is evaluated as an apparent viscosity function of the strain-rate and is extracted from the height evolution at the apex dome during the forming process. Results show a good agreement between parameter estimation using this method and independent values. Moreover, this characterisation method exposes the non-newtonian fluid behaviour of these materials during superplastic processes known as shear-thinning or pseudoplasticity.

show abstract

“…Most of the SPF simulations are conducted using commercial FEM software, such as ANSYS, ABAQUS and MARC [6,[116][117][118]. The ability to develop optimum gas pressure cycle is a key factor during the part forming process.…”

Section: Finite Element Modelingmentioning

confidence: 99%

“…Recent studies suggest that the high temperature forming behavior of AZ31 is controlled by two creep mechanisms. Taleff et al[118] developed a model that accounts for both grain boundary sliding creep and dislocation climb creep at elevated temperature. At high temperatures and slow strain rates, grain boundary sliding creep controls deformation.…”

mentioning

confidence: 99%

Hybrid superplastic forming of AZ31 magnesium alloy

Guo¹

View full text Add to dashboard Cite

A mechanism-dependent material model for the effects of grain growth and anisotropy on plastic deformation of magnesium alloy AZ31 sheet at 450°C

Cited by 35 publications

References 45 publications

Comparative studies of hyperbolic sine constitutive models for constant pressure superplastic tests

Comparative studies of hyperbolic sine constitutive models for constant pressure superplastic tests

Superplastic Materials Characterisation Based on Free-Bulge Tests

Hybrid superplastic forming of AZ31 magnesium alloy

Contact Info

Product

Resources

About