Thermodynamically consistent constitutive modeling of distortional hardening for wrought Mg alloys under non-proportional loading

2017 ◽  
Vol 700 ◽  
pp. 690-694
Author(s):  
Baodong Shi ◽  
Yan Peng ◽  
Chong Yang ◽  
Fusheng Pan ◽  
Qiuming Peng
Keyword(s):  
Constitutive Modeling ◽  
Mg Alloys ◽  
Proportional Loading

Dislocation Substructures and Nonproportional Hardening

1990 ◽  
Vol 112 (4) ◽  
pp. 456-464 ◽  
Author(s):  
Shiing-Hwa Doong ◽  
D. F. Socie ◽  
I. M. Robertson
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Stainless Steels ◽  
Constitutive Modeling ◽  
Cyclic Hardening ◽  
Ofhc Copper ◽  
Proportional Loading ◽  
Nonproportional Loading ◽  
Transmission Electron ◽  
Type 304

The dislocation substructures created in 1100 aluminum, OFHC copper, and type 304 and 310 stainless steels by in-phase (proportional) and 90 deg out-of-phase (nonproportional) tension-torsion cyclic loading were examined with a transmission electron microscope. Multislip structures (cells and subgrains) are observed in aluminum under both in-phase and 90 deg out-of-phase tension-torsion loading. For copper and stainless steel, single-slip structures (planar dislocations, matrix veins, and ladders) are observed after proportional loading, whereas multislip structures (cells and labyrinths) are observed after nonproportional loading. The increased cyclic hardening of copper and stainless steels under nonproportional loading is attributed to the change of dislocation substructures. Based on these observations, formulation of a nonproportionality parameter for constitutive modeling is discussed.

Loading path dependent distortional hardening of Mg alloys: Experimental investigation and constitutive modeling

2017 ◽  
Vol 90 ◽  
pp. 76-95 ◽  
Author(s):  
Baodong Shi ◽  
Yan Peng ◽  
Chong Yang ◽  
Fusheng Pan ◽  
Renju Cheng ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Constitutive Modeling ◽  
Mg Alloys ◽  
Loading Path ◽  
Path Dependent

Electron-Probe Quantitative Energy-Dispersive Analysis of Trace Magnesium Concentrations in Ag-Mg Alloys

1996 ◽  
Vol 54 ◽  
pp. 510-511
Author(s):  
R. B. Marinenko
Keyword(s):  
Electron Probe ◽  
Energy Dispersive Spectrometry ◽  
Mg Alloys ◽  
Energy Dispersive ◽  
Energy Dispersive Analysis ◽  
High Tc ◽  
Alloy Wire ◽  
High Tc Superconductor ◽  
Eds Analysis ◽  
Superior Mechanical Properties

Internally oxidized Ag-Mg alloys are used as sheaths for high Tc superconductor wires because of their superior mechanical properties. The preparation and characteristics of these materials have been reported. Performance of the sheaths depends on the concentration of the magnesium which generally is less than 0.5 wt. percent. The purpose of this work was to determine whether electron probe microanalysis using energy dispersive spectrometry (EDS) could be used to quantitate three different Ag-Mg alloys. Quantitative EDS analysis can be difficult because the AgL escape peak occurs at the same energy (1.25 keV) as the Mg Kα peak. An EDS spectrum of a Ag-Mg alloy wire is compared to a pure Ag spectrum in Fig. 1.

Effect of CaO Addition on the High-Temperature Oxidation of Mg Alloys

2016 ◽  
Vol 54 (6) ◽  
pp. 390-399 ◽  
Author(s):  
Dong Bok Lee ◽  
Shae Kwang Kim ◽  
Soon Yong Park
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Mg Alloys ◽  
Temperature Oxidation
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