Microstructure, Properties and Corrosion Resistance of As-Cast Al-12Si-1.0Mn-0.6Mg-xSc Alloys

2021 ◽  
Author(s):  
Weiwei Yang ◽  
Richu Wang ◽  
Chaoqun Peng ◽  
Zhiyong Cai ◽  
Fanghe Guo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Corrosion Resistance ◽  
Chinese Character ◽  
Ingot Metallurgy ◽  
Eutectic Si ◽  
Long Rod ◽  
Dendritic Arm Spacing ◽  
Sc Addition ◽  
Thermo Physical Properties

Abstract Al-12Si-1.0Mn-0.6Mg-xSc (x = 0, 0.1, 0.2, and 0.3) alloys for electronic packaging were prepared by ingot metallurgy, and the microstructure, mechanical properties, thermo-physical properties and corrosion resistance were compared. A fine and dispersed Al3Sc phase is observed and the acicular β-Fe phase transforms into a Chinese character or massive α-Fe phase in the alloys with Sc addition. When the Sc content increases from 0 to 0.3%, the secondary dendritic arm spacing and the size of the eutectic Si reduce from 17.9 μm and 5.3 μm to 12.8 μm and 3.1 μm, respectively. Simultaneously, the morphology of eutectic Si changes from a rough long rod to an ellipsoid. The thermal expansion coefficient and thermal conductivity of the alloys reduce slightly with increasing the Sc content. The flexural strength of 291.9 MPa is obtained for the Al-12Si-1.0Mn-0.6Mg-0.3Sc, an increment of 20.4% as compared with the Sc-free alloy. Furthermore, the corrosion resistance of the alloys is improved by the minor Sc addition.

BRUSH ALLOY 3

Alloy Digest ◽  
1983 ◽  
Vol 32 (3) ◽  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Copper Alloy ◽  
Elevated Temperatures ◽  
Physical And Mechanical Properties ◽  
Heat Treating ◽  
Good Resistance ◽  
Good Corrosion Resistance

Abstract BRUSH Alloy 3 offers the highest electrical and thermal conductivity of any beryllium-copper alloy. It possesses an excellent combination of moderate strength, good corrosion resistance and good resistance to moderately elevated temperatures. Because of its unique physical and mechanical properties, Brush Alloy 3 finds widespread use in welding applications (RWMA Class 3), current-carrying springs, switch and instrument parts and similar components. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as casting, forming, heat treating, machining, joining, and surface treatment. Filing Code: Cu-454. Producer or source: Brush Wellman Inc..

850.0 and 852.0 ALUMINUM ALLOY BEARING BARS

Alloy Digest ◽  
1988 ◽  
Vol 37 (9) ◽  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Heat Treating ◽  
Light Metal ◽  
General Purpose ◽  
High Ductility ◽  
Higher Temperature ◽  
Bearing Alloy

Abstract 850.0 ALUMINUM Alloy can be considered the general purpose light metal bearing alloy. Its good thermal conductivity keeps operating temperatures low. It has high ductility. In many applications it has been found to be superior to steel backed bearings. 852.0 ALUMINUM Alloy has higher mechanical properties making it suitable for heavier load and higher temperature applications. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength. It also includes information on corrosion resistance as well as heat treating and machining. Filing Code: Al-290. Producer or source: Federated Bronze Products Inc..

Effect of extrusion treatment on mechanical, thermal conductivity and corrosion resistance of magnesium alloys

2019 ◽  
Vol 9 (5) ◽  
pp. 405-412
Author(s):  
Bo Zhang ◽  
Huichao Jia ◽  
Quanyong Lian ◽  
Lianyu Jiang ◽  
Guangxin Wu
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Corrosion Resistance ◽  
Thermal Properties ◽  
Magnesium Alloys ◽  
Driving Force ◽  
Mechanical Performance ◽  
Cast Alloy ◽  
Extrusion Temperature ◽  
Zr Alloys

The effect of extrusion treatment on the mechanical, thermal and corrosion resistance of Mg–La–Zn–Zr alloys were presented. It is suggested that the amount of recrystallized grains played a major role in both mechanical properties and thermal properties. It should be noted the as-cast alloy shows the best thermal conductivity reached the value about 137.507 W/(m · K), however, the mechanical performance of magnesium alloys does not reach the expected results. The thermal properties of extruded alloys have slightly decreased and then increased with the increase of extrusion temperature. Then the tensile properties of Mg–La–Zn–Zr were significantly improved after extrusion treatment. Furthermore, with the increase of extrusion temperature, the elongation-to-fracture increased substantially. After extrusion treatment, the corrosion driving force of the alloy decreases, which reduces the corrosion tendency of the magnesium alloy. The alloy presented in this paper is expected to be applied in industry.

Effect of dendritic arm spacing on mechanical properties and corrosion resistance of Al 9 Wt Pct Si and Zn 27 Wt Pct Al alloys

2006 ◽  
Vol 37 (8) ◽  
pp. 2525-2538 ◽  
Author(s):  
Wislei R. Osorio ◽  
Pedro R. Goulart ◽  
Amauri Garcia ◽  
Givanildo A. Santos ◽  
Carlos Moura Neto
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Al Alloys ◽  
Dendritic Arm Spacing ◽  
Mechanical Properties And Corrosion

scholarly journals Effect of La and Sc Co-Addition on the Mechanical Properties and Thermal Conductivity of As-Cast Al-4.8% Cu Alloys

Metals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1866
Author(s):  
Zhao-Xi Song ◽  
Yuan-Dong Li ◽  
Wen-Jing Liu ◽  
Hao-Kun Yang ◽  
Yang-Jing Cao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Heat Capacity ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Grain Morphology ◽  
Cu Alloy ◽  
Average Grain Size ◽  
Sc Addition ◽  
Co Addition

The effects of La and La+Sc addition on mechanical properties and thermal conductivity of Al-4.8Cu alloy were comprehensively studied. The as-cast samples were characterized by optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and first-principles methods. The results reveal that the grain morphology of Al-4.8Cu alloy changes from dendrite to fine equiaxed grain with La, La+Sc addition. The average grain size of Al-Cu-La (Al-4.8Cu-0.4La) and Al-Cu-La-Sc (Al-4.8Cu-0.4La-0.4Sc) decreased by 37.2% (70.36 μm) and 63.3% (119.64 μm) respectively compared with Al-Cu (Al-4.8Cu). Al-Cu-La has the highest elongation among the three which is 34.4% (2.65%) higher than Al-Cu. Al-Cu-La-Sc has the highest ultimate tensile strength and yield strength which are 55.1% (80.9 MPa) and 65.2% (62.1 MPa) higher than Al-Cu, respectively. The thermal conductivity of Al-Cu-La and Al-Cu-La-Sc is 10.0% (18.797 W·m−1·k−1) and 6.5% (12.178 W·m−1·k−1) higher than Al-Cu alloy respectively. Compared with Al-Cu, Al-Cu-La has less shrinkage and porosity, the presence of Al4La and AlCu3 contribute a lot to the decrease of specific heat capacity and the increase of plasticity and toughness. The porosity of Al-Cu-La-Sc does not significantly decrease compared with Al-Cu-La, the presence of Al3Sc and AlCuSc bring about the increase of specific heat capacity and brittleness.

Effects of Scandium on Corrosion Resistance and Mechanical Properties of Cellular Al-Based Foams

2013 ◽  
Vol 747-748 ◽  
pp. 93-100 ◽  
Author(s):  
Li Huang ◽  
Dong Hui Yang ◽  
Hui Wang ◽  
Feng Ye ◽  
Zhao Ping Lu
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Titanium Hydride ◽  
Thickening Agent ◽  
Blowing Agent ◽  
Large Size ◽  
Sc Addition ◽  
Al Foams

Cellular Al-0.24wt.%Sc and Al-0.41wt.%Sc foams with a porosity ranging from 37 to 86% were successfully fabricated via the melt-foaming method with the calcium particles as the thickening agent and titanium hydride as blowing agent. The corrosion rate increased with the increasing of porosity for the cellular Al-0.24wt.%Sc, Al-0.41wt.%Sc and Al foams. Large size Al3Sc precipitates can accelerate the corrosion of the Al foams. However, T6-treatments could improve the corrosion resistance significantly. With T6-treatments, 0.24 wt.%Sc addition to Al foams exhibited unconspicuous decrease in the corrosion resistance but much improved strength.

The creation of protective and strengthening coatings by methods of electron beam processing in vacuum

2020 ◽  
Author(s):  
Tat'yana Radchenko ◽  
Yuriy Shevcov
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Heat Treatment ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Electron Beam ◽  
Protective Coatings ◽  
Metals And Alloys ◽  
Electron Beam Processing ◽  
The Creation

This monograph presents basic theoretical and applied issues of the process of electron beam heat treatment, cladding and welding in various industries. Reviewed hardware and technological aspects, peculiarities of formation of structure of metals and alloys, as well as the patterns of change of such physical-mechanical properties, such as hardness, wear resistance, corrosion resistance, thermal conductivity. The specific examples of the electron beam to create a strengthening and protective coatings. Can be recommended as a textbook for students of technical universities, engineers and researchers and practical workers in the field of welding production.

An analysis of the transport properties and mechanical stability of rapidly solidified Al-Sb alloy

2015 ◽  
Vol 10 (2) ◽  
pp. 2663-2681
Author(s):  
Rizk El- Sayed ◽  
Mustafa Kamal ◽  
Abu-Bakr El-Bediwi ◽  
Qutaiba Rasheed Solaiman
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Melt Spinning ◽  
Elastic Moduli ◽  
Mechanical Stability ◽  
Microstructural Analysis ◽  
Alloy System ◽  
Antimony Content ◽  
The Stability ◽  
Rapidly Solidified

The structure of a series of AlSb alloys prepared by melt spinning have been studied in the as melt–spun ribbons  as a function of antimony content .The stability  of these structures has  been  related to that of the transport and mechanical properties of the alloy ribbons. Microstructural analysis was performed and it was found that only Al and AlSb phases formed for different composition.  The electrical, thermal and the stability of the mechanical properties are related indirectly through the influence of the antimony content. The results are interpreted in terms of the phase change occurring to alloy system. Electrical resistivity, thermal conductivity, elastic moduli and the values of microhardness are found to be more sensitive than the internal friction to the phase changes. 

Incorporation of Iraqi Rocks in the Production of Eco-Friendly Cement Mortar

2020 ◽  
Vol 38 (10A) ◽  
pp. 1522-1530
Author(s):  
Rawnaq S. Mahdi ◽  
Aseel B. AL-Zubidi ◽  
Hassan N. Hashim
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Compressive Strength ◽  
Water Absorption ◽  
Structural Properties ◽  
Mechanical Milling ◽  
Cement Mortar ◽  
Cement Mortars

This work reports on the incorporation of Flint and Kaolin rocks powders in the cement mortar in an attempt to improve its mechanical properties and produce an eco-friendly mortar. Flint and Kaolin powders are prepared by dry mechanical milling. The two powders are added separately to the mortars substituting cement partially. The two powders are found to improve the mechanical properties of the mortars. Hardness and compressive strength are found to increase with the increase of powders constituents in the cement mortars. In addition, the two powders affect water absorption and thermal conductivity of the mortar specimens which are desirable for construction applications. Kaolin is found to have a greater effect on the mechanical properties, water absorption, and thermal conductivity of the mortars than Flint. This behavior is discussed and analyzed based on the compositional and structural properties of the rocks powders.

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