Role of initial texture on the plastic anisotropy of Mg–3Al–1Zn alloy at various temperatures

2011 ◽  
Vol 528 (3) ◽  
pp. 1162-1172 ◽  
Author(s):  
Byoung Ho Lee ◽  
Sung Hyuk Park ◽  
Seong-Gu Hong ◽  
Kyung-Tae Park ◽  
Chong Soo Lee
Keyword(s):  
Plastic Anisotropy ◽  
Initial Texture

Role of the α/β Interface in the Plastic Anisotropy of Single Colony Crystals in Titanium Alloys

2004 ◽  
Vol 819 ◽  
Author(s):  
M. F. Savage ◽  
J. Tatalovich ◽  
M. J. Mills
Keyword(s):  
Orientation Relationship ◽  
Basal Slip ◽  
Plastic Anisotropy ◽  
Slip Systems ◽  
Transmission Mechanisms ◽  
Single Colony ◽  
Transmission Electron ◽  
Strain Hardening Behavior ◽  
Slip Transmission

AbstractThe anisotropy in room temperature plastic deformation has been investigated in single α(HCP)/β(BCC) colonies of a commercial α/β titanium alloy (Ti-6Al-2Sn-4Zr-2Mo-0.1Si) oriented for activation of individual basal slip systems. Detailed transmission electron microscopy (TEM) studies of the slip transmission mechanisms through the α/β interfaces have been performed to elucidate the role of these interfaces in determining yield and strain hardening behavior. Significant anisotropy in the yield strengths and hardening rates for the 3 unique basal slip systems is measured, and is attributed to the different slip transmission mechanisms active due to the near-Burgers orientation relationship existing between α- and β-phases. These results are should be transferable to other alloy systems exhibiting this orientation relationship.

Tension-Compression Asymmetry in an Extruded Mg Alloy AZ31: Texture and Strain Rate Effects

2016 ◽  
Vol 849 ◽  
pp. 109-113 ◽  
Author(s):  
Li Li Chang ◽  
Li Peng Chi
Keyword(s):  
Strain Rate ◽  
Mechanical Behavior ◽  
Plastic Anisotropy ◽  
Mg Alloy ◽  
Strain Rate Effects ◽  
Alloy Az31 ◽  
Rate Effects ◽  
Initial Texture ◽  
Tension Compression Asymmetry

The influence of initial texture and strain rate on the mechanical behavior, especially anisotropy and tension-compression asymmetry (TCA) in AZ31 was investigated. The results indicated that the TCA in AZ31 decreased as the strain rate increased, plastic anisotropy increased as the strain rate increased. After compression, the massive twins were observed in AZ31 samples compressed on the extruding direction, while the fraction of twins in samples compressed perpendicular to the ED was smaller.

scholarly journals Interfacial Properties and Mechanical Behavior of Titanium Aluminides

1997 ◽  
Vol 492 ◽  
Author(s):  
M. H. Yoo ◽  
C. L. Fu
Keyword(s):  
Titanium Aluminides ◽  
Boundary Energy ◽  
Plastic Anisotropy ◽  
Interfacial Fracture ◽  
Two Phase ◽  
Deformation And Fracture ◽  
Crack Tip Plasticity ◽  
Lamellar Boundary ◽  
Lamellar Interfaces

ABSTRACTThe role of various interfaces in deformation and fracture behavior of two-phase TiAl-Ti3Al alloys is analyzed on the basis of the specific interfacial and surface energies determined from ab initio calculations. The propensity of twinning observed in these alloys is consistent with the low true-twin boundary energy. The strong plastic anisotropy reported in TiAl polysynthetically twinned (PST) crystals is attributed partly to the localized slip along lamellar interfaces, thus lowering the yield stress for soft orientations. Interfacial fracture energies are estimated to be the highest for the α2/γ lamellar boundary and the lowest for the 120° rotational γ/γ boundary. The fracture mode mixity plays an important role in the crack-tip plasticity by ordinary slip and true-twinning, leading to translamellar and interfacial fracture.

scholarly journals Modelling High Temperature Rolling Textures of FCC Metals

1992 ◽  
Vol 19 (4) ◽  
pp. 211-227 ◽  
Author(s):  
Cl. Maurice ◽  
J. H. Driver ◽  
L. S. Tóth
Keyword(s):  
High Temperature ◽  
Rate Sensitivity ◽  
Deformation Model ◽  
Plastic Shear ◽  
Fcc Metals ◽  
Crystallographic Slip ◽  
Model Predictions ◽  
Influence Of Temperature On ◽  
Initial Texture

A partially relaxed constraints grain deformation model is proposed to explain the influence of temperature on the rolling textures of fcc metals. The effects of the grain plastic shear in the TD/RD plane and the role of the rate sensitivity of crystallographic slip on the evolution of the texture have been investigated by numerical simulations for a random initial texture. The rate sensitivity and the TD/RD shear are assumed to increase with temperature. The progression from the Copper {112}<111> component towards Brass {110}<112> and S {123}<634> type textures is predicted at higher values of the rate sensitivity and the TD/RD shear. These model predictions compare well with published hot rolling textures of aluminium alloys. The concept of grain shear partial relaxation has been validated by room and high temperature channel die tests on {110}<112> oriented Al crystals constrained between aluminium polycrystals.

The role of plastic anisotropy deformation in fretting wear predictions

Wear ◽  
2006 ◽  
Vol 260 (11-12) ◽  
pp. 1274-1284 ◽  
Author(s):  
Lu Feng ◽  
Jinquan Xu
Keyword(s):  
Plastic Anisotropy ◽  
Fretting Wear
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