Microstructure and Properties of Mg-Al Based Casting Alloys Modified with Minor Alloying Elements

2005 ◽  
Vol 488-489 ◽  
pp. 147-150 ◽  
Author(s):  
Jeong Min Kim ◽  
Bong Koo Park ◽  
Joong Hwan Jun ◽  
Ki Tae Kim ◽  
Woon Jae Jung
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Heat Resistance ◽  
Hot Cracking ◽  
Alloying Elements ◽  
Az91 Alloy ◽  
Casting Alloys ◽  
Misch Metal ◽  
Result Show ◽  
Am50 Alloy

Minor alloying elements such as RE, Sb, and Si were added to Mg-Al based commercial alloys and their effects on the mechanical properties, corrosion resistance, and castability were investigated.The result show that small amount of cerium-rich misch metal (RE) addition with antimony enhances the heat resistance of AZ91 alloy effectively without deteriorating other good properties. The addition of Si with RE was also found to improve the heat resistance and casting capabilities (fluidity and hot cracking resistance) of AM50 alloy.

Development of Magnesium Based Alloys for High Temperature Applications

2011 ◽  
Vol 673 ◽  
pp. 179-184 ◽  
Author(s):  
Uma Thanu Subramonia Pillai ◽  
Amirthalingam Srinivasan ◽  
Krishnamorthy Raghukandan ◽  
Ballembettu Chandrasekhar Pai
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Corrosion Behavior ◽  
Creep Resistance ◽  
Alloying Elements ◽  
Az91 Alloy ◽  
Thermally Stable ◽  
Creep Properties ◽  
Temperature Applications

Individual and combined additions of elements like Si, Sb, Sr are carried out to AZ91 alloy and its microstructure, mechanical properties especially creep properties and corrosion behavior are investigated. In general, additions of the above elements improve the mechanical properties. Further, the results show these alloying elements introduce thermally stable intermetallics and thereby improve the creep performance. Among various additions, Sb addition provides highest creep resistance. With the Si and Sr additions, the corrosion resistance of AZ91 alloy is improved. Detailed micro-mechanisms are also studied and they are correlated with the properties studied.

scholarly journals Predicting the properties of nickel-based superalloys directional crystallization

2021 ◽  
Vol 99 (3) ◽  
pp. 15-22
Author(s):  
O.A. Glotka ◽  
◽  
V.Yu. Olshanetskii ◽  
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Heat Resistance ◽  
Regression Models ◽  
Nickel Alloys ◽  
Alloying Elements ◽  
Directional Crystallization ◽  
Heat Resistant ◽  
Basic Characteristics ◽  
Main Components

The aim of this work is to obtain predictive regression models, with which it is possible to adequately calculate the mechanical properties of heat-resistant nickel alloys, without prior experiments. Industrial alloys of directional crystallization of domestic and foreign production were selected for research. The values were processed by the method of least squares to obtain correlations with the receipt of mathematical equations of regression models that optimally describe these dependencies. As a result of processing of experimental data, the ratio of alloying elements which can be used for an estimation of mechanical properties taking into account complex influence of the main components of an alloy is offered for the first time. Since the dimensional mismatch of the lattice parameters is associated with the degree of concentration of solid-soluble hardening of γ- and γ'-phases, the efficiency of dispersion hardening of the alloy, creep rate and other properties, the obtained ratio allows to link these properties with multicomponent systems. Regression models are presented, with the help of which it is possible to calculate dimensional mismatch, strength, heat resistance, number of  phases and density of alloys with high accuracy. The regularities of the composition influence on the properties of heat-resistant nickel alloys of directional crystallization are established. It is shown that for multicomponent nickel systems it is possible to predict with high probability misfit, which significantly affects the strength characteristics of alloys of this class. The decrease in the value of misfit is accompanied by an increase in the solubility of the elements in the -solid solution at a value of the ratio of alloying elements of 1.5 - 1.6. However, an increase in the ratio of alloying elements greater than 2 is accompanied by an increase in misfit, because the -solid solution has reached a maximum of dissolution. The perspective and effective direction in the decision of a problem of forecasting of the basic characteristics influencing a complex of service properties of alloys both at development of new heat-resistant nickel alloys, and at perfection of structures of known industrial marks of this class is shown. Keywords: nickel-based superalloys, dimensional mismatch (γ / γ'- mismatch), strength, heat resistance.

scholarly journals STRUCTURE AND PROPERTIES MULTICOMPONENT BORIDE AND CARBIDE COATINGS FORMED IN MELTS

2020 ◽  
pp. 69-75
Author(s):  
V. A. Teldekov ◽  
L. M. Gurevich
Keyword(s):  
Corrosion Resistance ◽  
Heat Resistance ◽  
Multicomponent Diffusion ◽  
Alloying Elements ◽  
Structure And Properties ◽  
High Quality ◽  
Diffusion Coatings ◽  
Carbide Coatings ◽  
Hcl Solution

High-quality multicomponent diffusion boride and carbide layers on steel 40Cr and 25CrMnTi cemented steel were obtained by processing from 3 to 6 hours at 950 ° C in melts. The melts contained borax and ferroalloy additives. Chrome, vanadium and titanium were alloying elements. Comparative tests of heat resistance and corrosion resistance of diffusion coatings are carried out. Samples with carbide coatings Cr + V and Cr + V + Ti had the highest heat resistance. Samples with a diffusion layer based on iron borides and alloying elements showed the best corrosion resistance during long-term tests in a 10% HCl solution.

scholarly journals A Minuscule Appraise on the Outcome of BI and SB Metallic Additives on Refining the Microstructure and Mechanical Behavior of few Magnesium Alloys

2019 ◽  
Vol 9 (1S4) ◽  
pp. 829-832
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Mechanical Behavior ◽  
Magnesium Alloys ◽  
Alloying Elements ◽  
Grain Refiner ◽  
Intermediate Phases ◽  
Cast Magnesium Alloys ◽  
Cast Magnesium

This paper reviews the outcome of bismuth and antimony trappings on the microstructure and mechanical behavior of an assortment of commercial magnesium alloys. Various compositions of the Bi and Sb were discussed along with/without combination of other alloying elements. These additions have revealed to be resulted in the formation of Mg3Bi2 , Mg3Sb2 intermediate phases when added upon with corresponding alloying elements. Moreover the reasons for the observed changes due to the addition of these alloying elements were also reviewed. It is found that the accumulation of Bi phase as well as intermetallics and Sb intermediates has greatly improved the microstructure belonging to the as cast magnesium alloys thereby improving both mechanical and thermo-mechanical properties. It is also observed in the review that addition of thesealloying elements acted as grain refiner and improved the corrosion resistance of commercial magnesium alloys.

scholarly journals Aluminum- and Vanadium-free Titanium Alloys for Medical Applications

2020 ◽  
Vol 321 ◽  
pp. 05008
Author(s):  
Fabian Haase ◽  
Carsten Siemers ◽  
Lina Klinge ◽  
Cheng Lu ◽  
Patric Lang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Titanium Alloys ◽  
Human Body ◽  
Alloying Elements ◽  
Medical Applications ◽  
Good Corrosion Resistance ◽  
Cp Ti ◽  
Strength And Ductility

CP-Ti, Ti 6A l 4V (ELI), and Ti 6Al 7Nb are often used for manufacturing osteosynthesis products or implants. However, researches have revealed that Al and V can have detrimental effects on the human body. Therefore, several Al- and V-free near-α and (α+β) titanium alloys have been developed on the basis of CP-Ti Grade 4+ (Ti 0.4O 0.5Fe 0.08C). They should possess similar or better mechanical properties than Ti 6Al 4V (ELI) combined with an improved biocompatibility and good corrosion resistance. O, C, Fe, Au, Si, Nb, or Mo have been used as alloying elements, which are either already present in the human body or are biocompatible. Several of the studied alloys show a strength and ductility fulfilling the requirements of Ti 6Al 4V ELI as specified in ASTM F136. For instance, Ti 0.44O 0.5Fe 0.08C 2.0Mo exhibits a YTS of approx. 1005 MPa, an UTS of approx. 1015 MPa, and an elongation at rupture of at least 17%. Therefore, one or more of the studied alloys are promising candidates for replacing Ti 6Al 4V ELI in osteosynthesis and implant applications.

APEX TERNALLOY 6

Alloy Digest ◽  
1987 ◽  
Vol 36 (2) ◽  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
High Resistance ◽  
Room Temperature ◽  
Heat Treating ◽  
Aluminum Casting ◽  
Casting Alloys

Abstract APEX TERNALLOY 6 is one of a family of three APEX aluminum casting alloys (See APEX TERNALLOY 5, A1-273, November 1986.). It can be hardened by aging at room temperature and offers high mechanical properties. It has good castability, excellent machinability and high resistance to corrosion. Its many uses include aircraft components, gears, machinery parts, fittings, valves and ornamental products. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, heat treating, machining, joining, and surface treatment. Filing Code: Al-277. Producer or source: Apex International Alloys Inc..

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