Mechanical Properties of Rapidly Solidified MG-ZN Alloys

1985 ◽  
Vol 58 ◽  
Author(s):  
D. Themines ◽  
W. Riehemann ◽  
W. Henning ◽  
B.L. Mordike
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Significant Contribution ◽  
Discontinuous Precipitation ◽  
High Density ◽  
Quenching Rate ◽  
Fine Grain ◽  
Rapidly Quenched Alloys ◽  
Precipitation Behaviour ◽  
Rapidly Solidified

Rapidly quenched alloys differ from those that are conventionally solidified in the degree of supersaturation, the microstructure and the grain size. The quenching rate can thus be used to modify the mechanical properties. A fine grain size increases the hardness and ductility. The precipitation behaviour is modified by the high density of heterogeneous nuclei or high density of quenched in defects in that the rate of precipitation is increased. Discontinuous precipitation should make a significant contribution to the increase in strength as a result of the fine grain size.

Effect of Microcast-X Fine Grain Casting on the Microstructure and Mechanical Properties of K492M Alloy at 760°C

2016 ◽  
Vol 849 ◽  
pp. 549-556
Author(s):  
Pin Pin Hu ◽  
Qi Dong Gai ◽  
Qing Li ◽  
Xin Tang
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Grain Size ◽  
Rupture Life ◽  
Stress Rupture ◽  
Casting Alloy ◽  
Stress Rupture Life ◽  
Casting Technique ◽  
Conventional Casting ◽  
Fine Grain

The effect of Microcast-X fine grain casting on the microstructure and mechnical property K492M alloy at 760°C of was investigated. The results indicated that Microcast-X fine grain casting decreased grain size and dendrite space of γ′ phase and γ/γ′ eutectic. In addition, the element segregation decreased significantly compared to conventional casting technique. Also, the size and distribution of MC carbide were improved. By Microcast-X fine grain casting, the tensile strength increased from 934MPa of conventional casting alloy to 1089MPa and the elongation increased from 1.9% to 5.7%. In addition, the stress-rupture life increased from 28.8h of conventional casting alloy to 72.5h. And the fracture mechanism for the alloys by Microcast-X fine grain casting is trans-granular fracture toughness.

Effect of Sintering Temperature on Microstructure and Mechanical Properties of Nanocrystalline Aluminum 5083 Alloy

2015 ◽  
Vol 782 ◽  
pp. 113-118
Author(s):  
Ying Mei Teng ◽  
Zhao Hui Zhang ◽  
Zi Zhou Yuan
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Compressive Strength ◽  
Sintering Temperature ◽  
Initial Pressure ◽  
Fine Grain ◽  
Microstructure And Mechanical Properties ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Bulk Nanocrystalline

The bulk nanocrystalline (NC) aluminum (Al) 5083 was synthesized by spark plasma sintering (SPS) technique with low initial pressure of 1 MPa, high holding pressure of 300 MPa and holding time of 4 min at different sintering temperatures, using surface passivated nanopowders. The effect of sintering temperature on microstructure and mechanical properties of the bulk NC Al 5083 were investigated. Results indicate that the density, grain size, the hardness and the compressive strength of the bulk NC Al 5083 increase with an increase in sintering temperature. The mechanical properties of the material are greatly improved due to the fine grain size. The bulk NC Al 5083 sintered at 723 K has the highest micro-hardness of 2.37 GPa and the best compressive strength of 845 MPa.

Microstructure and Mechanical Properties of Extruded Mg-Zn-Ce-Zr Alloy Rods

2012 ◽  
Vol 706-709 ◽  
pp. 1199-1204
Author(s):  
Li Jin ◽  
Guang Li ◽  
Jie Dong ◽  
Wen Jiang Ding
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
High Ductility ◽  
Lower Yield ◽  
Fine Grain ◽  
Zn Addition ◽  
Alloy Strength ◽  
Element Addition ◽  
Extrusion Alloy ◽  
Zr Alloy

Mg-Ce based alloy is a significant extrusion alloy for high ductility and Zn is a promising element for the increase of strength in the alloys. The effects of Zn addition to the Mg-0.5%Ce-0.5%Zr alloy and the extrusion parameters on the microstructures and mechanical properties of Mg-Zn-Ce-Zr alloy have been investigated. The results suggest that Zn element addition will enhance alloy strength and save accepted ductility. The extrusion parameters have been optimized to get the fine grain size, random texture, and therefore to develop a higher ductility and lower yield asymmetry alloy.

The Preparation of Rapidly Solidified and Powder Metallurgy AZ91 Alloy

2012 ◽  
Vol 476-478 ◽  
pp. 29-33
Author(s):  
Shao Ding Sheng ◽  
Hong Ge Yan
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Alloy Powder ◽  
Optical Microscope ◽  
Az91 Alloy ◽  
Precipitated Phase ◽  
Precipitated Phases ◽  
Rapidly Solidified ◽  
Equiaxed Grains

AZ91 alloy powder was prepared by two-roller quenching equipment. The powders were consolidated and extruded into bar. The microstructures of the powders and bars were observed by optical microscope (OM), XRD, HRTEM and SEM. The results suggested that the grain size of the powder were equiaxed with the sizes of about 1~5μm. The as-extruded alloy bars retain equiaxed grains with a large number of precipitated phases, β-Al12Mg17 and AlMg2Zn. The alloy exhibited excellent mechanical properties, the ultimate and yield tensile strength were 383.2MPa and 275.1MPa respectively. The shape of the precipitated phase was approximately globular with the size of about 50~200nm.

SG-100 NICKEL

Alloy Digest ◽  
1967 ◽  
Vol 16 (7) ◽  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Corrosion Resistance ◽  
Heat Treating ◽  
Pure Nickel ◽  
Electrical And Magnetic Properties ◽  
Fine Grain ◽  
Temperature Performance ◽  
Excellent Corrosion Resistance ◽  
Nickel Strip

Abstract SG-100 is a pure nickel strip. It is ductile and has good mechanical properties with a uniform, fine grain size. It possesses excellent corrosion resistance and interesting electrical and magnetic properties. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming and heat treating. Filing Code: Ni-125. Producer or source: Sherritt Gordon Mines Limited.

Effects of Finish-Rolling Reduction on Microstructure and Mechanical Properties for C-Si-Mn Hot Rolled Dual-Phase Steel

2011 ◽  
Vol 339 ◽  
pp. 215-218
Author(s):  
Bin Bin Sun ◽  
Zhi Wei Jia ◽  
Hong Mei Zhang
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Dual Phase Steel ◽  
Lath Martensite ◽  
Rolling Reduction ◽  
Dual Phase ◽  
Fine Grain ◽  
Microstructure And Mechanical Properties ◽  
Finish Rolling ◽  
Hot Rolled

The experiments were carried out on the φ450 hot rolling mill at the State Key laboratory of Rolling and Automatic of Northeastern University. The effect of different finish-rolling reduction on the microstructure and mechanical properties of C-Si-Mn hot rolled dual-phase steel were studied. It is found that the grain size of the ferrite would be finer with the increasing of finish-rolling reduction. Through the controlling of the finish-rolling reduction, grain size of the ferrite can be finer, so the better properties can be obtained by fine grain and sub-grain strengthened. With the low volume of lath martensite, the elongation of sample is high, the yield-strength ratio is low, and complex properties are better.

Novel Grain Refiner for Hypo- and Hyper-Eutectic Al-Si Alloys

2011 ◽  
Vol 690 ◽  
pp. 49-52 ◽  
Author(s):  
Magdalena Nowak ◽  
Nadendla Hari Babu
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Al Alloys ◽  
Grain Structure ◽  
Grain Refiner ◽  
Silicon Alloys ◽  
Fine Grain ◽  
Cooling Conditions ◽  
Wide Range ◽  
Master Alloys

A novel effective grain refiner for hypo and hyper-eutectic Aluminium-Silicon alloys has been developed. The composition of the grain refiner has been optimized to produce a fine grain structure and finer eutectic. Effectiveness of grain size under various cooling conditions has also been investigated to simulate various practical casting conditions. For comparative purposes, a wide range of Al alloys have been produced with the addition of commercially available Al-5Ti-B master alloys. The results show that the addition of novel grain refiner reduces the grain size significantly. As a result of fine grains, the porosity in the solidified alloys is remarkably lower. A notable improvement in mechanical properties has also been observed.

Microstructures and Mechanical Properties of Y2O3 Ceramics

2017 ◽  
Vol 726 ◽  
pp. 179-183
Author(s):  
Tong Yu Zhu ◽  
Jin Feng Xia
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Sintering Temperature ◽  
High Density ◽  
Average Grain Size ◽  
Basic Performance ◽  
Different Temperatures ◽  
Microstructures And Mechanical Properties

Currently, Y2O3 ceramics are widely used in various fields. The basic performance of Y2O3 ceramics were sintered temperatures are studied in this paper, their phase compositions and microstructure are studied with XRD and SEM. The mechanical properties of Y2O3 ceramics at different temperatures are studied. The sintering temperature of Y2O3 ceramic significantly affected the final grain size and density. It was found that a high density and fine average grain size of Y2O3ceramic can be simultaneously achieved when the sintering temperature was 1600°C. To determine the best sintering temperature, grain size, density, and mechanical properties were considered, and the most suitable sintering temperature was found to be 1600°C.

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