Characterization of strengthening precipitate phases in a Mg–Zn alloy

2007 ◽  
Vol 56 (8) ◽  
pp. 645-648 ◽  
Author(s):  
X. Gao ◽  
J.F. Nie
Keyword(s):  
Zn Alloy ◽  
Strengthening Precipitate

Characterization of Coherent, Ordered Precipitates in Nickel-Base Alloys

1973 ◽  
Vol 31 ◽  
pp. 144-145
Author(s):  
B. H. Kear ◽  
J. M. Oblak
Keyword(s):  
Stable Phase ◽  
Nickel Base Superalloy ◽  
Alloy 718 ◽  
Commercial Alloy ◽  
Precipitate Morphology ◽  
Continuous Precipitation ◽  
Nickel Base ◽  
Base Superalloy ◽  
Strengthening Precipitate

A nickel-base superalloy is essentially a Ni/Cr solid solution hardened by additions of Al (Ti, Nb, etc.) to precipitate a coherent, ordered phase. In most commercial alloy systems, e.g. B-1900, IN-100 and Mar-M200, the stable precipitate is Ni3 (Al,Ti) γ′, with an LI2structure. In A lloy 901 the normal precipitate is metastable Nis Ti3 γ′ ; the stable phase is a hexagonal Do2 4 structure. In Alloy 718 the strengthening precipitate is metastable γ″, which has a body-centered tetragonal D022 structure.Precipitate MorphologyIn most systems the ordered γ′ phase forms by a continuous precipitation re-action, which gives rise to a uniform intragranular dispersion of precipitate particles. For zero γ/γ′ misfit, the γ′ precipitates assume a spheroidal.

Characterization of the corrosion behaviour of Zn and Zn alloy electrodeposits: Atmospheric and accelerated tests

1998 ◽  
Vol 40 (2-3) ◽  
pp. 401-410 ◽  
Author(s):  
R. Ramanauskas ◽  
L. Muleshkova ◽  
L. Maldonado ◽  
P. Dobrovolskis
Keyword(s):  
Corrosion Behaviour ◽  
Accelerated Tests ◽  
Zn Alloy

Electrochemical and structural characterization of sputter-deposited Mg–Nb and Mg–Nb–Al–Zn alloy films

2013 ◽  
Vol 17 (6) ◽  
pp. 1649-1656 ◽  
Author(s):  
Laurynas Staišiūnas ◽  
Konstantinas Leinartas ◽  
Meilutė Samulevičienė ◽  
Povilas Miečinskas ◽  
Asta Grigucevičienė ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Alloy Films ◽  
Sputter Deposited ◽  
Zn Alloy

scholarly journals Quantification of porosity in extensively nanoporous thin films in contact with gases and liquids

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Netanel Shpigel ◽  
Sergey Sigalov ◽  
Fyodor Malchik ◽  
Mikhael D. Levi ◽  
Olga Girshevitz ◽  
...  
Keyword(s):  
Thin Films ◽  
Analytical Techniques ◽  
Grazing Incidence ◽  
Angle Scattering ◽  
Complex Architectures ◽  
Precise Quantification ◽  
Complex Characterization ◽  
Induced Changes ◽  
Zn Alloy

Abstract Nanoporous layers are widely spread in nature and among artificial devices. However, complex characterization of extensively nanoporous thin films showing porosity-dependent softening lacks consistency and reliability when using different analytical techniques. We introduce herein, a facile and precise method of such complex characterization by multi-harmonic QCM-D (Quartz Crystal Microbalance with Dissipation Monitoring) measurements performed both in the air and liquids (Au-Zn alloy was used as a typical example). The porosity values determined by QCM-D in air and different liquids are entirely consistent with that obtained from parallel RBS (Rutherford Backscattering Spectroscopy) and GISAXS (Grazing-Incidence Small-Angle Scattering) characterizations. This ensures precise quantification of the nanolayer porosity simultaneously with tracking their viscoelastic properties in liquids, significantly increasing sensitivity of the viscoelastic detection (viscoelastic contrast principle). Our approach is in high demand for quantifying potential-induced changes in nanoporous layers of complex architectures fabricated for various electrocatalytic energy storage and analytical devices.

Microstructure characterization of a directionally solidified Mg-12wt.%Zn alloy: Equiaxed dendrites, eutectic mixture and type/ morphology of intermetallics

2018 ◽  
Vol 204 ◽  
pp. 105-131 ◽  
Author(s):  
Nathália C. Verissimo ◽  
Crystopher Brito ◽  
Conrado R. Afonso ◽  
José E. Spinelli ◽  
Noé Cheung ◽  
...  
Keyword(s):  
Eutectic Mixture ◽  
Microstructure Characterization ◽  
Directionally Solidified ◽  
Zn Alloy ◽  
Equiaxed Dendrites

scholarly journals Characterization of Tensile Properties and Fracture Toughness of Equal Channel Angular Pressed Al-Zn Alloy

2021 ◽  
Author(s):  
Mohan kumar S ◽  
H K Govindaraju ◽  
M D Kiran
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Solution Treatment ◽  
Treatment Temperature ◽  
Solution Treatment Temperature ◽  
Artificial Ageing ◽  
Angular Pressing ◽  
Dislocation Strengthening ◽  
Zn Alloy

Abstract Influence of Equal channel angular pressing on mechanical properties and Fracture toughness of Al-Zn alloy were studied in present investigation. Samples are successfully processed using the ECAP technique for up to a four passes by using route A. Al-Zn alloys were heated to a solid solution treatment temperature at 550oC for 2 hours prior to ECAP, this treatment introduces the precipitates which were capable of obstructing motions of dislocation and improves the refinement of the grain during ECAP process Finally, artificial ageing was performed at a temperature of 190°C for 0-20 hours with an interval of 2 hr and specimens are cooledat room temperature with natural air.Fracture toughness was found experimentally for ECAP processed samples using SE (B) specimens according to ASTM E399 standard.Study revealed the enhancement in mechanical properties such as yield strength, ultimate strength and microhardness after four passes by route A technique.The improvement in the fracture toughness properties of artificially aged ECAP samples can also be due to dislocation strengthening, grain boundary strengthening, and the creation of much finer UFG grains, according to the results. Despite the increased tensile strength after ECAP, the ductility behaviour has decreased due to the precipitation of GP zones and dispersion of η, ή, T and E within the Aluminium matrix Furthermore, scanning electron microscope (SEM) micrographs revealed that ductile fracture with large dimples occurred in the artificial aged samples after the ECAP procedure.

TEM and 3DAP characterization of an age-hardened Mg–Ca–Zn alloy

2005 ◽  
Vol 53 (6) ◽  
pp. 675-679 ◽  
Author(s):  
J OH ◽  
T OHKUBO ◽  
T MUKAI ◽  
K HONO
Keyword(s):  
Zn Alloy
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