Stress-corrosion cracking susceptibility of AZ31 alloy after varied heat-treatment in 3.5 wt.% NaCl solution
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L. C. Tsao
Abstract
The stress corrosion cracking behavior of a commercial AZ31 magnesium alloy after T5 and T6 heat treatments under a vacuum of 10−3 torr has been evaluated via slow strain rate tensile tests in an aqueous 3.5 wt.% NaCl solution. The experimental results show that this material displays a high sensitivity to stress corrosion cracking. The fractured surface was consistent with a significant transgranular component. Double-line cracking that resulted from twinning could be readily spotted on the cleavage plane. The presence of such deformation twins accompanied by the formation of voids is the main reason for the stress corrosion cracking susceptibility of this alloy. The disappearance of twins after artificial aging at 260 °C for 4 h significantly improves the corrosion resistance, increases the breakdown potential difference ΔΦ (thus lowering the pitting tendency), and decreases the corrosion current density in a 3.5 wt.% NaCl solution.
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Articles in the same Issue
- Contents
- Contents
- Editorial
- Hans-Peter Degischer – 65th birthday
- Basic
- X-ray and neutron imaging – Complementary techniques for materials science and engineering
- Fast in-situ X-ray micro tomography characterisation of microstructural evolution and strain-induced damage in alloys at various temperatures
- Thermo-kinetic computer simulation of differential scanning calorimetry curves of AlMgSi alloys
- Influence of stacking fault energy and alloying on stage V hardening of HPT-deformed materials
- Thermo-physical properties of silver/carbon fibre composites
- Influence of reinforcement contiguity on the thermal expansion of alumina particle reinforced aluminium composites
- A continuum based microstructure model of inhomogeneous hardening and recovery as a pre-stage of recrystallization nucleation
- Applied
- Metal foams – towards microcellular materials
- Gigacycle fatigue response of tool steels produced by powder metallurgy compared to ingot metallurgy tool steels
- Characterization of the microstructure and damage mechanisms in a Ti6Al4V alloy modified with 1 wt.% B
- Structural and age hardening characteristics of near eutectic Al–Si alloys
- Stress-corrosion cracking susceptibility of AZ31 alloy after varied heat-treatment in 3.5 wt.% NaCl solution
- Tensile deformation behavior of AA5083-H111 at cold and warm temperatures
- Experimental investigation of thermal fatigue behaviour of header tube to stub welded joint in power plants
- Synthesis and characterization of nanostructured Cu/ZnO/Al2O3 from lyotropic liquid crystalline templates
- DGM News
- Personal