Improved Constitutive Equations for Modeling Strain Softening—Part II: Predictions for Aluminum

1984 ◽  
Vol 106 (4) ◽  
pp. 343-348 ◽  
Author(s):  
T. C. Lowe ◽  
A. K. Miller
Keyword(s):  
High Purity ◽  
Constitutive Equations ◽  
Strain Softening ◽  
Substantial Improvement ◽  
Deformation Model ◽  
Independent Data ◽  
Model Predictions ◽  
Deformation Behaviors ◽  
High Purity Aluminum

The capabilities of a new deformation model, MATMOD-4V, are demonstrated by comparison of computer predictions against independent data for high purity aluminum. In particular, model predictions of strain softening are presented and discussed. The predictive abilities of MATMOD-4V represent a substantial improvement over earlier versions of the MATMOD constitutive equations. The strength of the approach is illustrated by MATMOD-4V’s ability to predict deformation behaviors not explicitly built into the model.

Improved Constitutive Equations for Modeling Strain Softening—Part I: Conceptual Development

1984 ◽  
Vol 106 (4) ◽  
pp. 337-342 ◽  
Author(s):  
T. C. Lowe ◽  
A. K. Miller
Keyword(s):  
Constitutive Equations ◽  
Work Hardening ◽  
Short Range ◽  
Conceptual Development ◽  
Strain Softening ◽  
Dynamic Recovery ◽  
Internal Stresses ◽  
Wide Range ◽  
Deformation Behaviors ◽  
Heterogeneous Microstructures

A microstructurally based model of nonelastic deformation is proposed which is capable of predicting strain softening as well as a wide range of other deformation behaviors. The model, an extension of the MATMOD constitutive equations, now includes representations of both short range and long range internal stresses, strengthening due to homogeneous and heterogeneous microstructures, and dynamic recovery. Additional conceptual improvements regarding the interactions between various sources of work hardening and the influence of straining direction upon deformation induced microstructures are also introduced. The physical origins of these extensions, their relationship to strain softening, and their implementation in the new model, MATMOD-4V, are presented.

Photopyroelectric Measurement of the Thermal Diffusivity of Recrystallized High Purity Aluminum

1991 ◽  
Vol 3 (1) ◽  
pp. 69-80
Author(s):  
S. B. Peralta ◽  
S. C. Ellis ◽  
C. Christofides ◽  
A. Mandeiis ◽  
H. Sang ◽  
...  
Keyword(s):  
Thermal Diffusivity ◽  
High Purity ◽  
High Purity Aluminum

Rate Dependent Constitutive Equations of Cyclic Softening

1985 ◽  
Vol 40 (7) ◽  
pp. 653-665
Author(s):  
J. S. Mshana ◽  
A. S. Krausz
Keyword(s):  
Stress Relaxation ◽  
Low Temperature ◽  
Constitutive Equations ◽  
Strain Softening ◽  
Structural Characteristics ◽  
High Stress ◽  
Cyclic Strain ◽  
Cyclic Stress ◽  
Cyclic Softening ◽  
Stress Softening

Constitutive equations of cyclic strain and stress softening for materials with low internal stress levels are derived from the rate theory. The study shows that over the high stress and low temperature range where the description of plastic flow in cyclic softening can be approximated with activation over a single energy barrier, cyclic strain softening is well related to stress relaxation process while cyclic stress softening is related to creep process. The material structural characteristics for cyclic strain softening, cyclic stress softening and stress relaxation are identical. Subsequently, it is shown that cyclic stress and strain softening within the high stress and low temperature range can be evaluated from the constitutive equations using the material structural characteristics measured from a simple stress relaxation test.

Anelastic deformation of high purity aluminum at room temperature

1976 ◽  
Vol 10 (2) ◽  
pp. 189-194 ◽  
Author(s):  
Nahum Nir ◽  
Edward W. Hart ◽  
Che-Yu Li
Keyword(s):  
High Purity ◽  
Room Temperature ◽  
High Purity Aluminum ◽  
Anelastic Deformation

scholarly journals Surface segregation of transition elements in high-purity aluminum foil

2005 ◽  
Vol 55 (3) ◽  
pp. 142-146
Author(s):  
Harushige TSUBAKINO ◽  
Yuichiro YAMAMOTO ◽  
Atsushi YAMAMOTO ◽  
Michitaka TERASAWA ◽  
Tohru MITAMURA ◽  
...  
Keyword(s):  
High Purity ◽  
Surface Segregation ◽  
Aluminum Foil ◽  
Transition Elements ◽  
High Purity Aluminum

Migration of grain boundaries and triple junctions in high-purity aluminum during annealing after slight cold rolling

2015 ◽  
Vol 107 ◽  
pp. 134-138 ◽  
Author(s):  
Wenhong Yin ◽  
Weiguo Wang ◽  
Xiaoying Fang ◽  
Congxiang Qin ◽  
Xiaoguang Xing
Keyword(s):  
Cold Rolling ◽  
Grain Boundaries ◽  
High Purity ◽  
Triple Junctions ◽  
High Purity Aluminum

Micro-Alloyed High-Purity Aluminum for Low-Temperature Conductor Applications

1997 ◽  
Vol 160 (2) ◽  
pp. 413-418
Author(s):  
A. Takahashi ◽  
L. C. McDonald ◽  
H. Yasuda ◽  
K. T. Hartwig
Keyword(s):  
Low Temperature ◽  
High Purity ◽  
High Purity Aluminum

Results of R&D and Production on Two Types of High-Purity Aluminum-Stabilized Superconducting Cable

2016 ◽  
Vol 26 (3) ◽  
pp. 1-4 ◽  
Author(s):  
Kota Katayama ◽  
Keisuke Kitazato ◽  
Hirokazu Tsubouchi ◽  
Akira Takagi ◽  
Ricardo Tanaka ◽  
...  
Keyword(s):  
High Purity ◽  
High Purity Aluminum
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