The Effect of Trace Elements on the Cooling Curves, Microstructure and Mechanical Properties of Eutectic Aluminium-Silicon Alloy

Cast Metals ◽  
1991 ◽  
Vol 4 (2) ◽  
pp. 72-82 ◽  
Author(s):  
S. Venkateswaran ◽  
R. M. Mallya ◽  
M. R. Seshadri
Keyword(s):  
Mechanical Properties ◽  
Trace Elements ◽  
Cooling Curves ◽  
Silicon Alloy ◽  
Microstructure And Mechanical Properties

scholarly journals Solidification, Microstructure, and Mechanical Properties of Mg-Nd-Gd-Zn-Zr Magnesium Alloy with 1.5 Samarium

2021 ◽  
Vol 12 (3) ◽  
pp. 1763-1768
Author(s):  
R. Ahmad Et.al
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Rare Earth ◽  
Magnesium Alloy ◽  
Initial Phase ◽  
Earth Element ◽  
Base Alloy ◽  
Intermetallic Phases ◽  
Cooling Curves ◽  
Microstructure And Mechanical Properties

The influence of samarium (Sm) content on the solidification characteristics, microstructure, and mechanical properties of Mg–2.8wt%Nd–1.5wt%Gd–0.5wt%Zn–0.5wt%Zr magnesium alloy was studied. The cooling curves and microstructure analysis results showed that Sm rare earth element refined the grains of the alloys, where the solidification time of α-Mg phase of decreased as addition of Sm, which reflected to the microstructure of alloy and the grains became refined, also Sm combined with the initial phase of the intermetallic base alloy and crystallized along the grain boundaries. In addition, Mg41Sm5, Mg3Zn6Sm and (Mg, Zn)3Sm new intermetallic phases were formed as addition of Sm. Both grain refinement and formed intermetallic phases led to the improvement in hardness and tensile strength.

Effect of Silicon Content on the Microstructure and Mechanical Properties of Niobium–Silicon Alloy

2019 ◽  
Vol 83 (10) ◽  
pp. 1235-1243 ◽  
Author(s):  
M. I. Karpov ◽  
V. I. Vnukov ◽  
T. S. Stroganova ◽  
D. V. Prokhorov ◽  
I. S. Zheltyakova ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silicon Content ◽  
Silicon Alloy ◽  
Microstructure And Mechanical Properties

Effect of Sr and Nd on Microstructure and Mechanical Properties of AZ91-1Si Alloy

2009 ◽  
Vol 610-613 ◽  
pp. 765-770 ◽  
Author(s):  
Zhi Wen Zou ◽  
Shou Mei Xiong
Keyword(s):  
Mechanical Properties ◽  
Trace Elements ◽  
Intermetallic Compound ◽  
Grain Refinement ◽  
Room Temperature ◽  
Chinese Script ◽  
Mg2si Phase ◽  
Microstructure And Mechanical Properties ◽  
Refinement Mechanism ◽  
Morphology Modification

In present work, trace elements Sr and Nd were added into AZ91-1wt%Si alloys. The alloys were cast into a permanent mould and then machined into test bars. The microstructure and mechanical properties at room temperature of the specimens were investigated. Results showed that complicated Chinese script Mg2Si phase decreased in size with the increase of Sr addition. When Sr addition increased to 0.1wt%, the Mg2Si phase was changed from Chinese script shape into uniform polygon shape completely. At the same time, mechanical properties improved due to the morphology modification of the Mg2Si phase. An intermetallic compound containing Mg, Al, Nd and Si was found when Nd was added to the alloy. Remarkable modification on the shape and distribution of the Mg2Si phase was observed because of the intermetallic compound, which leads to a great change in mechanical properties. The grain refinement mechanism of Sr and Nd elements on the Mg2Si phase was discussed.

scholarly journals Effect of Austenization Temperature on the Microstructure in Cr-Mn-Si Steel

2019 ◽  
Vol 9 (2) ◽  
pp. 4942-4945
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Trace Elements ◽  
Polymorphic Transformation ◽  
High Strength ◽  
Heat Treatments ◽  
Thermal Treatments ◽  
Microstructure And Mechanical Properties ◽  
Bainite Structure ◽  
Strength And Plasticity

This work is a part of research on the microstructure and mechanical properties of Cr-Mn-Si steels after various thermal treatments. In order to increase the resistance of the materials against failure it is necessary to possess simultaneously high strength and plasticity at the same time. Normally, in conventional metals, this is impossible. The purpose of the present study is to trace the polymorphic transformation of the microstructure and the redistribution of the trace elements in the corresponding microstructural transformations of the steel at each stage of applied heat treatment - austenization, quenching, austempering, tempering. The chosen sequence of applied heat treatments is to obtain a bainite structure of up to 50% in order to achieve high strength and toughness of the material.

Effect of TiC Particulates on the Microstructure and Mechanical Properties of Aluminium-Based Metal Matrix Composite

2014 ◽  
Vol 903 ◽  
pp. 145-150 ◽  
Author(s):  
Sulaiman Suraya ◽  
Shamsuddin Sulaiman ◽  
Ali Munira ◽  
Abdul Aziz Fazilah
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix ◽  
Matrix Material ◽  
Matrix Composites ◽  
Alloy Matrix ◽  
Casting Technique ◽  
Silicon Alloy ◽  
Microstructure And Mechanical Properties ◽  
The Matrix ◽  
Tic Particulates

In this research, metal-matrix composites (MMCs) of aluminium-11.8% silicon alloy matrix reinforced with titanium carbides particulates were fabricated by the casting technique. Aluminium-11.8% silicon alloy is selected as the matrix material and titanium carbide as particulates are mixed in different weight percentages, 5%, 10%, 15% and 20%wt. The cylinder composite castings are made by pouring the composite mixture in copper permanent-molds. The microstructure and mechanical properties of these composite materials were investigated. The effects of reinforced materials on weight percentages addition of particulate on the particulate distribution in aluminium-11.8% silicon alloy composites and SEM observation of the fracture surfaces of tensile tested specimens were deliberate. Moreover, cylinder castings without particulate addition are made and compared with the result based on the properties and microstructural features. It is found that the microstructure and mechanical properties of composites significantly improved by the use of particle reinforced into aluminium alloy.

Sign in / Sign up

Export Citation Format

Share Document