Precipitation behavior and mechanical properties of Al-Zn-Mg-Cu matrix nanocomposites: Effects of SiC nanoparticles addition and heat treatment

2021 ◽  
Vol 172 ◽  
pp. 110827
Author(s):  
Jingjing Li ◽  
Jiang Ju ◽  
Zhen Zhang ◽  
Yang Zhou ◽  
Yifei Luo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Precipitation Behavior ◽  
Sic Nanoparticles ◽  
Matrix Nanocomposites

Upshot of Ultrasonic Amplitude on Developing the AA6061/SiC Metal Matrix Nanocomposites

2015 ◽  
Vol 787 ◽  
pp. 558-562
Author(s):  
L. Poovazhagan ◽  
K. Kalaichelvan ◽  
V.R. Balaji ◽  
P. Haripriya ◽  
S.C. Amith
Keyword(s):  
Mechanical Properties ◽  
Significant Role ◽  
Metal Matrix ◽  
Casting Process ◽  
Ultrasonic Cavitation ◽  
Sic Nanoparticles ◽  
Metal Matrix Nanocomposites ◽  
Good Dispersion ◽  
Matrix Nanocomposites

In this work, AA6061/1.25 vol. % SiCp metal matrix nanocomposites (MMNCs) were fabricated using the ultrasonic cavitation assisted casting process. To investigate the effect of ultrasonic amplitudes on processing the MMNCs, the MMNC samples were processed with 15 µm, 30 µm and 50 µm of ultrasonic amplitudes. The results indicate that the ultrasonic amplitudes play a significant role in dispersing the SiC nanoparticles uniformly in the AA6061 melt and it also affecting the mechanical properties of the fabricated MMNCs. The AA6061/1.25 vol. % SiCp MMNC sample processed with 30 µm of ultrasonic amplitude possessed the good dispersion of SiCp in the Al melt and hence better mechanical properties compared to the MMNCs processed with 15 µm and 50 µm amplitudes.

scholarly journals Effect of Dendrite Fraction on the M23C6 Precipitation Behavior and the Mechanical Properties of High Cr White Irons

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1576
Author(s):  
Jun-Seok Oh ◽  
Young-Gy Song ◽  
Baig-Gyu Choi ◽  
Chalothorn Bhamornsut ◽  
Rujeeporn Nakkuntod ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Primary Dendrite ◽  
Carbide Precipitation ◽  
Eutectic Phase ◽  
M23c6 Carbide ◽  
Eutectic Solidification ◽  
Precipitation Behavior ◽  
Conventional Heat Treatment ◽  
High Fraction

High Cr white irons with various fractions of primary dendrite have been prepared through the modification of their chemical composition. Increasing C and Cr contents decreased the primary dendrite fraction. Eutectic solidification occurred with the phase fraction ratio of austenite: M7C3 = 2.76:1. The measured primary dendrite fractions were similar to the calculated results. ThermoCalc calculation successfully predicted fractions of M7C3, austenite, and M23C6. Conventional heat treatment at high temperature caused a destabilization of austenite, releasing it’s solute elements to form M23C6 carbide. Precipitation of M23C6 during destabilization preferentially occurred within primary (austenite) dendrite, however, the precipitation scarcely occurred within austenite in eutectic phase. Thus, M23C6 precipitation by destabilization was relatively easy in alloys with a high fraction of primary dendrite.

Effect of SiC nanoparticles on the precipitation behavior and mechanical properties of 7075Al alloy

2020 ◽  
Vol 55 (14) ◽  
pp. 6145-6160 ◽  
Author(s):  
Bowen Pu ◽  
Xiaobin Lin ◽  
Bowen Li ◽  
Xiaofeng Chen ◽  
Chunnian He ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Precipitation Behavior ◽  
Sic Nanoparticles ◽  
7075Al Alloy

Mechanical Properties and Microstrutures of Nano-Sized SiC Particles Reinforced AZ91D Nanocomposites Fabricated by High Intensity Ultrasonic Assisted Casting

2009 ◽  
Vol 618-619 ◽  
pp. 449-452 ◽  
Author(s):  
Shi Ying Liu ◽  
Fei Peng Gao ◽  
Qiong Yuan Zhang ◽  
Wen Zhen Li
Keyword(s):  
Mechanical Properties ◽  
High Intensity ◽  
Intermediate Phase ◽  
Casting Method ◽  
Magnesium Matrix ◽  
Alloy Matrix ◽  
Sic Nanoparticles ◽  
The Matrix ◽  
Ultrasonic Assisted ◽  
Matrix Nanocomposites

A high intensity ultrasonic assisted casting method was used to fabricate SiC nanoparticles reinforced magnesium matrix nanocomposites (n-SiCp/AZ91D). The microstructures and mechanical properties of the nanocomposites were investigated. The results show that n-SiCp are well dispersed in the matrix and the grain size was refined. A HRTEM study of the interface between n-SiCp and the matrix suggests that SiC bonds well with matrix without forming an intermediate phase. With the lower addition of n-SiCp, the mechanical properties of nanocomposites are greatly improved. As compared to an unreinforced magnesium alloy matrix, the tensile and yield strength were improved by 43.6% and 117% respectively.

Effect of Heat Treatment on Mechanical Properties of Super Duplex Stainless Steel

2010 ◽  
Vol 89-91 ◽  
pp. 290-294 ◽  
Author(s):  
Sun Mi Kim ◽  
Kwang Tae Kim ◽  
Yong Deuk Lee ◽  
Chong Soo Lee
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Room Temperature ◽  
Sigma Phase ◽  
Charpy Impact ◽  
Lattice Misfit ◽  
Isothermal Heat Treatment ◽  
Super Duplex Stainless Steel ◽  
Precipitation Behavior ◽  
Super Duplex Stainless Steels

A study was made to investigate the precipitation behavior of sigma phase via various heat treatments and corresponding mechanical properties of super duplex stainless steels. Isothermal heat treatment was performed at temperature range of 600~1000°C to draw TTT diagram for sigma phase. Tensile and Charpy impact tests were performed at room temperature and the results were analyzed in relation with the microstructure. The effect of lattice misfit strains due to the precipitation of sigma phase on the mechanical properties was also discussed.

Precipitate Phases and Mechanical Properties of Heat-Treated ASTM F 90 Co-Cr-W-Ni Alloy

2014 ◽  
Vol 616 ◽  
pp. 258-262 ◽  
Author(s):  
Kosuke Ueki ◽  
Kyosuke Ueda ◽  
Takayuki Narushima
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Biomedical Applications ◽  
Treatment Temperature ◽  
X Ray Diffraction ◽  
Precipitation Behavior ◽  
X Ray ◽  
Phase Precipitate ◽  
Heat Treated ◽  
Ni Alloy

The precipitation behavior during heat treatment and resulting mechanical properties of ASTM F 90 Co-20Cr-15W-10Ni (mass%) alloys were investigated with regards to their biomedical applications. Heat treatment was conducted at temperatures of 873 to 1623 K, for a holding time of 259.2 ks. The precipitates produced were then electrolytically extracted from the alloys and analyzed by X-ray diffraction (XRD). This revealed that the precipitates formed were an M23X6 type and/or η-phase (i.e., an M6X-M12X type). The M23X6-type precipitate was detected across the entire heat-treatment temperature range; however, the η-phase precipitate was only detected at 1073 to 1473 K, becoming dominant at 1173 to 1373 K. The formation of M23X6 type precipitates at 873 K is shown to improve the mechanical properties of this alloy, whereas the domination by the η-phase precipitate at higher temperatures causes deterioration in the ductility.

Effect of Different Normalizing Processes on Microstructure, Precipitation Behavior and Mechanical Properties of V-Ti-Micro-Alloyed Steel Alloys

2020 ◽  
Vol 835 ◽  
pp. 243-250
Author(s):  
Ahmed Hamed ◽  
Mamdouh Eissa ◽  
Abdelhakim Kandil ◽  
Omnia Ali ◽  
Taha Mattar
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
High Strength ◽  
Optimum Combination ◽  
Alloyed Steel ◽  
Steel Alloy ◽  
Precipitation Behavior ◽  
Steel Alloys ◽  
Micro Alloyed Steel ◽  
Holding Temperature

Normalizing is an effective heat treatment in improving the microstructure and developing the mechanical properties of micro-alloyed steel. The normalizing parameters such as temperature and holding time are the main keys to microstructure and mechanical properties controlling. Therefore, obtaining an optimum combination of mechanical properties must be subjected to an ideal combination of these parameters. Furthermore, adjusting the optimum normalizing parameters must be considered for every chemical composition depending on the critical transformation temperatures. In this work, four micro-alloyed steel alloys containing V (0.008-0.1wt %) and Ti (0.002-0.072) were held on different normalizing temperatures for 30 minutes. The first holding temperature was carried out just above the Ac3 temperature and the second was carried out above the Ac3 by 100°C (Ac3+100°C). With the controlled normalizing condition, V-Ti-micro-alloyed steel alloy has produced an ultra-fine structure of grain size 2.2 microns and combined high strength of 725 MPa YS, 1058 MPa UTS and good ductility of 20%.

Crystallization of MgO • Al2 • SiO2 • ZrO2 glasses

1986 ◽  
Vol 44 ◽  
pp. 440-441
Author(s):  
M. A. McCoy
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Powder Processing ◽  
Glass Composition ◽  
Ceramic Powder ◽  
Transformation Toughening ◽  
Ceramic Powder Processing ◽  
Processing Techniques ◽  
Ceramic Matrices

Transformation toughening by ZrO2 inclusions in various ceramic matrices has led to improved mechanical properties in these materials. Although the processing of these materials usually involves standard ceramic powder processing techniques, an alternate method of producing ZrO2 particles involves the devtrification of a ZrO2-containing glass. In this study the effects of glass composition (ZrO2 concentration) and heat treatment on the morphology of the crystallization products in a MgO•Al2•SiO2•ZrO2 glass was investigated.

Sign in / Sign up

Export Citation Format

Share Document