Effects of preferred orientation on the grain size dependence of yield strength in metals

Wilson, D. V.; Chapman, J. A.

doi:10.1080/14786436308207317

Cited by 105 publications

(33 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this connection, it should be mentioned that Wilson and Chapman had established in a pioneering report a range in k ¾ for textured magnesium materials developed at larger grain sizes and leading to a lowest value of k ¾ = ³1.6 MPa·mm 1/2 for flat bar extruded product. 36) Related results had been reported by Chapman and Wilson of a strong increase in material ductility as the grain size was refined even carrying on to demonstration of superplastic flow at the finer grain sizes of a few micrometers. 37) The results were later incorporated into a compilation of H-P type results for the true fracture strain of conventional and ultrafine grain size magnesium results 38) beginning from an even earlier pioneering report made by Herenguel and Lacombe.…”

Section: H-p For the Hcp Casementioning

confidence: 56%

60 Years of Hall-Petch: Past to Present Nano-Scale Connections

Armstrong

2014

Mater. Trans.

196

View full text Add to dashboard Cite

Pioneering research results reported in the early 1950's by E. O. Hall and N. J. Petch on iron and steel materials have led to an expanded description of the grain size dependence of the complete stressstrain behavior of a wider range of materials and including assessments of other mechanical properties such as the ductile to brittle transition behavior and the hardness of materials, particularly, of nanocrystalline materials. The dislocation pile-up model that was presented originally for the inverse square root of grain diameter dependence of material strength has endured. Most recently, the pile-up model description has been more definitely associated with the Griffith theory of achieving a critical stress concentration at the tip of a crack; and, the Hall-Petch analysis has been connected to the macro-scale description of the fracture mechanics stress intensity parameter. These topics and other "60 years of Hall-Petch" type researches are tracked over time in the present report while giving special emphasis to current order-of-magnitude strength improvements that are reported for metals with nanopolycrystalline grain diameters.

show abstract

Section: H-p For the Hcp Casementioning

confidence: 56%

60 Years of Hall-Petch: Past to Present Nano-Scale Connections

Armstrong

2014

Mater. Trans.

196

View full text Add to dashboard Cite

show abstract

“…Besides, the texture effects may contribute to strengthening in the recycled specimen because it is well known that a texture change strongly affects 0.2% yield stress of extruded Mg alloy specimens. 17) Variations in stress and elongation at 573 and 673 K as a function of strain rate for the recycled specimens and the asreceived specimens are shown in Fig. 3.…”

Section: Resultsmentioning

confidence: 99%

Mechanical Properties of Mg–Al–Ca Alloy Recycled by Solid–State Recycling

et al. 2005

View full text Add to dashboard Cite

Solid-state recycling for runner scraps of Mg-Al-Ca alloy was carried out by extrusion at 673 K and mechanical properties of the recycled Mg alloy were investigated by tensile tests. At room temperature, the recycled specimen showed a good combination of high ultimate tensile strength (348 MPa), high 0.2% proof stress (305 MPa) and large elongation (9%). Additionally, the recycled specimen exhibited superplastic behavior at 573 and 673 K. The excellent mechanical properties of the recycled specimen result most likely from fine dispersion of precipitates which is attained by hot extrusion.

show abstract

“…In the extruded sample, in general, the basal plane is parallel to the extrusion direction and is also parallel to round surface of the sample. 13,19,20) Therefore, when the forging direction is perpendicular to the extrusion direction, there are some grains with the basal plane parallel to the forging direction. In such case basal slip is difficult and tension twinning easily occurs.…”

Section: Tensile Propertiesmentioning

confidence: 99%

Microstructures and Tensile Properties of ECAE-Processed and Forged AZ31 Magnesium Alloy

et al. 2003

View full text Add to dashboard Cite

In order to achieve same level of high strength and high ductility as 6061 aluminum forging alloy that is currently used for automobile applications, AZ31 magnesium alloy rod with a large diameter of 40 mm was subjected to ECAE-processing, and the microstructures and mechanical properties of the ECAE-processed specimens were investigated. Furthermore, automobile knuckle arm was produced by forging using the ECAE-processed material, and the mechanical properties of the forged product and their strain rate dependencies were investigated under impact tensile load conditions. 4pass-ECAE-processed specimen has fine and uniform microstructure and a texture whose basal planes are mainly parallel to the extrusion direction with some inclined at angles up to 45 to the extrusion direction. Therefore, they show high ductility even if the tensile direction is parallel to the extrusion direction. The knuckle arm forged using the ECAE-processed material exhibits high elongation even in the high strain rate region. Furthermore, the tensile strength, fracture elongation and absorption energy of the forged product increase with increasing strain rate and their values are higher than those of T6-treated 6061 aluminum forging alloy specified by JIS.

show abstract

Effects of preferred orientation on the grain size dependence of yield strength in metals

Cited by 105 publications

References 2 publications

60 Years of Hall-Petch: Past to Present Nano-Scale Connections

60 Years of Hall-Petch: Past to Present Nano-Scale Connections

Mechanical Properties of Mg–Al–Ca Alloy Recycled by Solid–State Recycling

Microstructures and Tensile Properties of ECAE-Processed and Forged AZ31 Magnesium Alloy

Contact Info

Product

Resources

About

Effects of preferred orientation on the grain size dependence of yield strength in metals

Cited by 105 publications

References 2 publications

60 Years of Hall-Petch: Past to Present Nano-Scale Connections

60 Years of Hall-Petch: Past to Present Nano-Scale Connections

Mechanical Properties of Mg&ndash;Al&ndash;Ca Alloy Recycled by Solid&ndash;State Recycling

Microstructures and Tensile Properties of ECAE-Processed and Forged AZ31 Magnesium Alloy

Contact Info

Product

Resources

About

Mechanical Properties of Mg–Al–Ca Alloy Recycled by Solid–State Recycling