Effects of Microstructure and Partial Melting on Tensile Properties of AZ91 Magnesium Cast Alloy

Mechanical properties of AZ91 cast alloy depend strongly on the morphology (size and distribution) of the second (β-Mg17Al12) phase. It was observed that low ductility of AZ91 alloy was attributed to the brittle nature of the β phase particles at which microcracks initiated. These microcracks then coalesced contributing to the fracture of alloy. Quantitative study on microcracking progress revealed that cast samples with coarse microstructures fractured at low strain due to the non-uniform distribution of bulk blocky β particles at interdendrite region. These fracture surfaces exhibited clear cleavage mode. Fine cast microstructure presented quasicleavage fracture mode with clear dimple and tear ridges. The partial melting (and resolidification) heat treatment improved tensile properties, which was in disagreement with the available data from literature.

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INCONEL 713C

Alloy Digest ◽

10.31399/asm.ad.ni0050 ◽

1959 ◽

Vol 8 (2) ◽

Keyword(s):

High Temperature ◽

Physical Properties ◽

Tensile Properties ◽

Thermal Fatigue ◽

Rupture Strength ◽

Cast Alloy ◽

International Nickel Company ◽

Nickel Chromium ◽

Temperature Performance ◽

Inconel 713C

Abstract INCONEL 713C is a nickel-chromium cast alloy which possesses outstanding rupture strength at 1700 F. combined with excellent resistance to thermal fatigue and good castability. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as creep and fatigue. It also includes information on high temperature performance as well as machining and joining. Filing Code: Ni-50. Producer or source: International Nickel Company Inc..

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NORAL 730

Alloy Digest ◽

10.31399/asm.ad.al0101 ◽

1961 ◽

Vol 10 (3) ◽

Keyword(s):

Physical Properties ◽

Tensile Properties ◽

Cast Alloy ◽

High Speeds ◽

Unit Loading

Abstract Noral 730 is an aluminum-tin-silicon cast alloy used for solid bearings at high unit loading and at high speeds and medium temperatures. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on machining. Filing Code: Al-101. Producer or source: Northern Aluminium Company Ltd.

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HASTELLOY ALLOY D

Alloy Digest ◽

10.31399/asm.ad.ni0029 ◽

1956 ◽

Vol 5 (11) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

Sulfuric Acid ◽

Physical Properties ◽

Tensile Properties ◽

Boiling Point ◽

Cast Alloy ◽

Heat Treating

Abstract HASTELLOY ALLOY-D is a cast alloy composed primarily of nickel and silicon, and is exceptionally resistant to sulfuric acid of all concentrations even up to the boiling point. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-29. Producer or source: Haynes Stellite Company.

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F28-0

Alloy Digest ◽

10.31399/asm.ad.ci0064 ◽

2007 ◽

Vol 56 (9) ◽

Keyword(s):

Corrosion Resistance ◽

Physical Properties ◽

Tensile Properties ◽

Cast Alloy ◽

Heat Treating ◽

White Iron ◽

Good Corrosion Resistance

Abstract F28-0 is an abrasion-resistant cast alloy that is a martensitic white iron. The alloy possesses good corrosion resistance and is often used to handle slurries. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: CI-64. Producer or source: Kubota Metal Corporation.

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Mechanical Performance of a Cast A354 Aluminium Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.794-796.489 ◽

2014 ◽

Vol 794-796 ◽

pp. 489-494 ◽

Cited By ~ 2

Author(s):

J.H. Sandoval ◽

Adel M.A. Mohamed ◽

S. Valtierra ◽

F.H. Samuel

Keyword(s):

Tensile Properties ◽

Quality Index ◽

Mechanical Performance ◽

Cast Alloy ◽

Solution Treatment ◽

Aging Treatment ◽

Test Results ◽

Cast Aluminum ◽

Treatment Conditions ◽

Cast Aluminum Alloys

Cast aluminum alloys are an important group of materials which find wide application in the automotive industry. Insufficient studies have been carried out to date with regard to the mechanical performance of the aged A354 alloy. Therefore, the present work investigates the Quality index charts with the purpose of setting the limits of the tensile properties, as well as for comparing the mechanical behavior of cast alloy A354, to delineate the effect of the solution treatment applied. Tensile properties upon artificial aging in the temperature range of 155–350oC for times ranging from 2 to 100 hours are also investigated. The results showed that the use of quality index charts is a satisfactory method for presenting tensile test results and, for assessing the effect of solution and aging treatment conditions subjected to the modified and grain-refined A354 alloys. It is also observed that the quality index, Q, is more sensitive to variations in the tensile ductility than to tensile strength.

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Effects of Hot Extrusion on Microstructure, Texture and Mechanical Properties of Mg-5Li-3Al-2Zn Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.773-774.218 ◽

2013 ◽

Vol 773-774 ◽

pp. 218-225

Author(s):

Le Gan Hou ◽

Rui Zhi Wu ◽

Ji Qing Li ◽

Jing Huai Zhang ◽

Mi Lin Zhang ◽

...

Keyword(s):

Mechanical Properties ◽

Tensile Properties ◽

Grain Refinement ◽

Cast Alloy ◽

Hot Extrusion ◽

Eutectic Structure ◽

Basal Texture ◽

Lamellar Eutectic ◽

Lamellar Eutectic Structure

This work mainly studied the effects of hot extrusion on microstructure, texture and mechanical properties of Mg-5Li-3Al-2Zn alloy. The results show that the microstructures of as-cast and as-extruded alloys both consist of α-Mg matrix and lamellar eutectic structure (α-Mg and AlLi phases). During the hot extrusion, the large eutectic structure of as-cast alloy was crushed into small eutectic structure and the grains were effectively refined. A {0002} basal texture was formed after hot extrusion. The as-extruded alloy exhibits remarkably improved tensile properties, which is mainly attributed to the grain refinement and the formation of texture.

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Tensile Properties of Squeeze Cast Mg-Al-Sr Alloy under Applied Pressures

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1088.181 ◽

2015 ◽

Vol 1088 ◽

pp. 181-185

Author(s):

Li Fang ◽

Henry Hu ◽

Shu Ping Wang

Keyword(s):

Tensile Properties ◽

Squeeze Casting ◽

Cast Alloy ◽

Microstructural Analysis ◽

Applied Pressure ◽

External Pressure ◽

Squeeze Cast ◽

Porosity Reduction ◽

Alloy Increase ◽

Porosity Measurements

The focus of this study is on development of alternative manufacturing processes for potential high temperature magnesium-aluminium-strontium alloys. The effect of external pressure on tensile properties of squeeze cast Mg-Al-Sr alloy was investigated. Four different applied levels, 0, 30, 60 and 90 MPa, were employed to exert on a Mg-6 wt.% Al – 0.5 wt.% Sr alloy during squeeze casting. The results of tensile testing indicate that the ultimate tensile strength (UTS), yield strength (YS) and elongation (Ef) of the squeeze cast Mg-Al-Sr alloy increase with increasing applied pressure level. The microstructural analysis and porosity measurements suggest that the tensile property enhancement resulting from applied pressure should be attributed to microstructure refinement and porosity reduction of the squeeze cast alloy.

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Processing, Microstructure and Mechanical Properties of SiCp/AZ91 Mg Matrix Composites Fabricated by Squeeze Casting

Materials Science Forum ◽

10.4028/www.scientific.net/msf.546-549.499 ◽

2007 ◽

Vol 546-549 ◽

pp. 499-502

Author(s):

X. Qiu ◽

Xiao Jun Wang ◽

Ming Yi Zheng ◽

Kun Wu

Keyword(s):

Mechanical Properties ◽

Tensile Properties ◽

Squeeze Casting ◽

Volume Fraction ◽

Matrix Alloy ◽

Matrix Composites ◽

Magnesium Matrix Composites ◽

The Matrix ◽

Az91 Magnesium ◽

Different Diameters

The fabrication processing, mechanical properties and fracture characters of SiCp/AZ91 magnesium matrix composites fabricated by squeeze casting were investigated. The SiC particles with different diameters (5μm, 20μm and 50μm) were employed as the reinforcement in the composites, the volume fraction of them was 50% in all cases. Experimental results showed that when the size of SiC particle decreased, the tensile properties of the composite increased. The tensile properties of SiCp/AZ91 composite with small particles are controlled by the properties of matrix alloy and the strength of the interface between the matrix and reinforcements, but the composites reinforced by large particles are controlled by the fracture of the particles.

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