On the role of Al and Zn addition on eutectic morphology in Mg-3Ca-2Sn cast alloy

2019 ◽  
Vol 162 ◽  
pp. 432-436 ◽  
Author(s):  
N.T.B.N. Koundinya ◽  
Ravi Sankar Kottada
Keyword(s):  
Cast Alloy ◽  
Zn Addition ◽  
Eutectic Morphology

Hardening of Al–Si–Cu–Mg Cast Alloys: Role of Ag and Zn addition

2021 ◽  
Author(s):  
A. M. Samuel ◽  
F. H. Samuel ◽  
M. H. Abdelaziz ◽  
H. W. Doty
Keyword(s):  
Zn Addition ◽  
Cast Alloys

Electron Back Scattering Diffraction Analysis of A357 Alloy Modified by Sr

2010 ◽  
Vol 160-162 ◽  
pp. 831-835
Author(s):  
Zhong Wei Chen ◽  
Hai Fang Zhang ◽  
Jiang Chao Zhao
Keyword(s):  
Cast Alloy ◽  
Primary Aluminum ◽  
Mapping Technique ◽  
Eutectic Solidification ◽  
Preparation Technique ◽  
Ion Milling ◽  
A357 Alloy ◽  
Back Scattering ◽  
Eutectic Si ◽  
Eutectic Morphology

Microstructure of A357 alloy modified by Sr has been investigated by the Electron Back Scattering Diffraction (EBSD) mapping technique using a Field Emission Gun Scanning Electron Microscopy (FEG-SEM). An appropriate sample preparation technique by ion milling was applied to obtain a sufficiently smooth surface for EBSD mapping. Results show that the eutectic morphology in microstructure of A357 alloy modified by Sr was changed to fine fibrous, and the grain size was refined. By comparing the orientation of the aluminum in the eutectic to that of the primary aluminum dendrites, the nucleation and growth mechanism of the eutectic solidification in A357 cast alloy was determined. The eutectic Si phase of the modified sample nucleates on the heterogeneous nuclei located in the region between primary α-Al dendrites and grows up, while the eutectic Si phase of the sample without modification nucleates on the primary α-Al dendrites and grows up.

Understanding the Role of Nanodispersions on the Properties of A390 Hypereutectic Al-Si Cast Alloy

2014 ◽  
pp. 1361-1365 ◽  
Author(s):  
I. El Mahallawi ◽  
Othman A. Othman ◽  
M. H. Abdelaziz ◽  
H. Raed ◽  
T. Abd El-Fatah ◽  
...  
Keyword(s):  
Cast Alloy

scholarly journals Mechanical Behavior of Al–Al2Cu–Si and Al–Al2Cu Eutectic Alloys

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 194
Author(s):  
Qian Lei ◽  
Jian Wang ◽  
Amit Misra
Keyword(s):  
Compressive Strength ◽  
Failure Strain ◽  
Cast Alloy ◽  
Maximum Strength ◽  
Eutectic Alloys ◽  
Microstructural Refinement ◽  
Melt Pool ◽  
Rapid Solidification Technique ◽  
Eutectic Morphology ◽  
Better Than

In this study, laser rapid solidification technique was used to refine the microstructure of ternary Al–Cu–Si and binary Al–Cu eutectic alloys to nanoscales. Micropillar compression testing was performed to measure the stress–strain response of the samples with characteristic microstructure in the melt pool regions. The laser-remelted Al–Al2Cu–Si ternary alloy was observed to reach the compressive strength of 1.59 GPa before failure at a strain of 28.5%, which is significantly better than the as-cast alloy with a maximum strength of 0.48 GPa at a failure strain of 4.8%. The laser-remelted Al–Cu binary alloy was observed to reach the compressive strength of 2.07 GPa before failure at a strain of 26.5%, which is significantly better than the as-cast alloy with maximum strength of 0.74 GPa at a failure strain of 3.3%. The enhanced compressive strength and improved compressive plasticity were interpreted in terms of microstructural refinement and hierarchical eutectic morphology.

scholarly journals Comparison of Creep Properties of Cast and Wrought Haynes 282 Superalloy

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Young-Joo Kim ◽  
Jae-Hyeun Park ◽  
Yong-Sik Ahn
Keyword(s):  
Creep Test ◽  
Deformation Mechanism ◽  
Power Plants ◽  
Cast Alloy ◽  
Rupture Life ◽  
Test Results ◽  
Creep Properties ◽  
Temperature Capability ◽  
Cast Condition

Ni-based superalloy Haynes 282 was developed as a gas turbine material for use in the ultra-supercritical (USC) stage of next-generation coal-fired power plants. Temperatures in the USC stage exceed 700°C during operation. Despite the important role of Haynes 282 in increasing the performance of high-pressure turbines, as a result of its high-temperature capability, there is little information on the microstructure, deformation mechanism, or mechanical properties of the cast condition of this alloy. In this study, we compared the creep properties of Haynes 282 cast alloy with those of its wrought alloy counterpart. The tensile test results of cast and wrought Haynes 282 alloys over the temperature range 25–800°C showed that the cast product exhibited significantly lower strength and ductility compared with the wrought product at all test temperatures. A creep test performed at 750°C showed only a slight difference in the rupture life of the two products. Based on the creep test results, the deformation mechanism is discussed.

Role of segregated Si on tribological properties of aluminum cast alloy

2017 ◽  
Vol 2017 (0) ◽  
pp. S1110404
Author(s):  
Shogo HAYAKAWA ◽  
Toshiki SATO ◽  
Kazuki ENOMOTO ◽  
Hatsuhiko USAMI
Keyword(s):  
Tribological Properties ◽  
Cast Alloy

scholarly journals Role of Chemical Composition in Corrosion of Aluminum Alloys

Metals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 581 ◽  
Author(s):  
Lenka Kuchariková ◽  
Tatiana Liptáková ◽  
Eva Tillová ◽  
Daniel Kajánek ◽  
Eva Schmidová
Keyword(s):  
Chemical Composition ◽  
Aluminum Alloys ◽  
Cast Alloy ◽  
Critical Role ◽  
Secondary Aluminum ◽  
Corrosion Properties ◽  
Alloy Matrix ◽  
Exposure Test ◽  
Mechanical Properties And Corrosion

Aluminum alloys are the most important part of all shaped castings manufactured, especially in the aerospace and automotive industries. This work focuses on the corrosion properties of the heat-hardening aluminum alloys commonly used for production of automotive castings AlSi7Mg0.3 and on self-hardening AlZn10Si8Mg. Iron is a common impurity in aluminum cast alloy and its content increases by using secondary aluminum alloys. Therefore, experimental materials were developed, with chemical composition according to standards (primary alloys) and in states with an increasing content of Fe. The experimental aluminum alloys are briefly discussed in terms of their chemical composition, microstructure, mechanical properties and corrosion behavior. Corrosion properties were examined using three types of corrosion tests: exposure test, potentiodynamic tests, and Audi tests. Corrosion characteristics of materials were evaluated using stereo, optical and scanning electron microscopy, energy dispersive X-ray analysis, too. Correlation of pit initiation sites with microstructural features revealed the critical role of iron-rich phases, silicon particles and corresponding alloy matrix.

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