Influence of Zn concentration on stretch formability at room temperature of Mg–Zn–Ce alloy

Chino, Yasumasa; Huang, Xinsheng; Suzuki, Ken; Sassa, Kensuke; Mabuchi, Mamoru

doi:10.1016/j.msea.2010.09.081

Cited by 120 publications

(40 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although Mg alloy sheets normally show good ductility in uniaxial tension and have reasonably high r-values, [1,2] they generally exhibit very poor stretch formability at ambient temperatures compared to other commonly used hexagonal close-packed (hcp) metals, such as titanium or zirconium. This is mainly attributed to the very strong basal textures that normally develop in Mg during most industrial rolling procedures [3][4][5] and the low number of easily activated slip systems at room temperature. [6][7][8][9][10][11][12] Plastic deformation in the thickness direction of such strong textured sheets would require the activation of hc+ai slip; however, the critical resolved shear stress (CRSS) values for such slip modes are relatively high at room temperature.…”

Section: Gá Bor Timá R and Joã O Quinta Da Fonsecamentioning

confidence: 99%

Modeling Twin Clustering and Strain Localization in Hexagonal Close-Packed Metals

Timár

Fonseca

2014

Metall Mater Trans A

View full text Add to dashboard Cite

It has been suggested that microtextures related to deformation twinning can affect the stretch formability of hexagonal close-packed (hcp) metals. We study the evolution of strain localization and the formation of twin clusters in hcp polycrystals due to softening induced by twinning reorientation of the crystal lattice. We performed three-dimensional crystal plasticity finite element simulations of uniaxial and biaxial deformation using basal starting textures of various strengths. Weaker textures resulted in relatively homogeneous deformation, strong textured systems, however, showed significant shear band formation in biaxial tension. In this case, highly strained regions coincided very well with dense clusters of twins. Due to the scarcity of available slip systems, such shear localization due to twin clustering may lead to eventual crack initiation and failure. The spatial correlation of twins was analyzed and was found to be significantly affected by texture. The decay of the correlation function was well approximated by a power law, a characteristic of a wide range of phenomena associated with self-organized criticality.

show abstract

Section: Gá Bor Timá R and Joã O Quinta Da Fonsecamentioning

confidence: 99%

Modeling Twin Clustering and Strain Localization in Hexagonal Close-Packed Metals

Timár

Fonseca

2014

Metall Mater Trans A

View full text Add to dashboard Cite

show abstract

“…However, it has been recently reported that addition of specific elements such as Ce, Y and Ca give rise to a significant enhancement in stretch formability at room temperature in Mg alloys. [1][2][3][4][5][6][7][8][9][10] For example, Mg-1.5 mass%Zn-0.1 mass%Ca alloy exhibited a large Erichsen value of 8.2 at room temperature. 5) This value is comparable with the stretch formability of commercial wrought aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

“…16,17) Hence, the enhanced stretch formability by the addition of the specific elements is attributed to the unique basal texture: a reduction in basal texture intensity and a tilt of the basal poles to the TD. 2,3,5,6,8,10,18,19) A recent work 10) showed that the addition of Ca in Mg-Zn alloy gave rise to the formation of the unique texture, while the unique basal texture was not formed by addition of Ca in pure Mg. Thus, effects of Ca are complicated.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ca on Tensile Properties and Stretch Formability at Room Temperature in Mg-Zn and Mg-Al Alloys

et al. 2011

Self Cite

View full text Add to dashboard Cite

The tensile tests and the Erichsen tests at room temperature have been performed on seven kinds of Mg alloys: Mg-1.5Zn, Mg-1.5Zn-0.1Ca, Mg-3Zn, Mg-3Zn-0.1Ca, Mg-3Al, Mg-3Al-0.1Ca and Mg-1Al-1Zn-0.1Ca-0.5Mn alloys. In the Mg-Zn alloys, the 0.2% proof stress at 90, which was the angle between the tensile direction and the RD, was decreased by addition of Ca, while the 0.2% proof stress at 0 was increased by addition of Ca. Also, an increase in elongation to failure by addition of Ca at 90 was larger than that at 0 . However, such variations in tensile properties by addition of Ca were not found in the Mg-Al alloy. The stretch formability for the Mg-Zn alloys was significantly enhanced by addition of Ca, while the stretch formability of the Mg-Al alloy was not enhanced by addition of Ca. These results by the mechanical testing are ascribed to the variations in basal texture by addition of Ca.

show abstract

“…[4][5][6][7][8][9][10][11] For example, in the case of rolled Mg-Zn alloys, it was reported that a rolled Mg-1.5 mass%Zn-0.2 mass%Ce alloy sheet showed excellent sheet formability corresponding to the 5000 series Al alloys. 4,5) The addition of minor special elements causes not only a reduction in the intensity of the basal plane texture but also spreading of the basal poles toward the transverse direction (TD).…”

Section: Introductionmentioning

confidence: 99%

“…4,5) The addition of minor special elements causes not only a reduction in the intensity of the basal plane texture but also spreading of the basal poles toward the transverse direction (TD). [5][6][7][8][9][10][11][12][13][14][15] The unique texture such as ''rare earth (RE)'' texture component, 16) corresponding to the h11 2 21i direction parallel to the extrusion direction (ED), is obtained during extruding of Mg-Mn-RE and Mg-RE alloys. [16][17][18][19][20][21][22][23] Recently, Luo et al 24) reported that the RE texture component also appears in an extruded Mg-Zn-Ce alloy, and it exhibits a good balance of tensile yield stress and ductility compared with an extruded Mg-Ce alloy.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Texture and Mechanical Properties of Mg-Zn-Ce Alloy Extruded at Different Temperatures

et al. 2011

Self Cite

View full text Add to dashboard Cite

The microstructure, texture and mechanical properties of Mg-1.5 mass%Zn-0.2 mass%Ce alloys extruded at different extrusion temperatures were investigated. A ''rare earth (RE)'' texture component, which laid at about 20 from h2 1 1 1 10i in an inverse pole figure, appeared in the as-extruded specimen, only when the extrusion temperature was set to 703 K. It is suggested that a high extrusion temperature of around 723 K is essential for the formation of RE texture component. Electron back-scatter diffraction (EBSD) measurements revealed that the RE texture component originated from dynamic recrystallized grains in the band microstructure around the unrecrystallized grains, in contrast to the results of previous studies, in which it originated from shear bands in the unrecrystallized grains. The specimen extruded at 703 K and subsequently annealed showed a lower yield stress and higher ductility than that extruded at 573 K and subsequently annealed, owing to the wider spread of texture originating from the RE texture component in the as-extruded specimen.

show abstract

Influence of Zn concentration on stretch formability at room temperature of Mg–Zn–Ce alloy

Cited by 120 publications

References 31 publications

Modeling Twin Clustering and Strain Localization in Hexagonal Close-Packed Metals

Modeling Twin Clustering and Strain Localization in Hexagonal Close-Packed Metals

Effects of Ca on Tensile Properties and Stretch Formability at Room Temperature in Mg-Zn and Mg-Al Alloys

Microstructure, Texture and Mechanical Properties of Mg-Zn-Ce Alloy Extruded at Different Temperatures

Contact Info

Product

Resources

About