Effect of matrix microstructure on the matrix/M2B wear interaction and its quantitative characterization in an Fe-2wt%B alloy

Wear ◽  
2021 ◽  
Vol 472-473 ◽  
pp. 203608
Author(s):  
Yanliang Yi ◽  
Qiang Li ◽  
Shaolei Long ◽  
Zhen Lv ◽  
Shuangjian Li ◽  
...  
Keyword(s):  
Quantitative Characterization ◽  
Matrix Microstructure ◽  
The Matrix

scholarly journals EBSD Analysis of Metal Matrix Nanocomposite Microstructure Produced by Powder Metallurgy

Nanomaterials ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 878 ◽  
Author(s):  
Íris Carneiro ◽  
Filomena Viana ◽  
Manuel F. Vieira ◽  
José V. Fernandes ◽  
Sónia Simões
Keyword(s):  
Powder Metallurgy ◽  
Advanced Materials ◽  
Sintering Process ◽  
Electron Backscattered Diffraction ◽  
Matrix Microstructure ◽  
Metal Matrix Nanocomposite ◽  
The Matrix ◽  
Dislocation Annihilation ◽  
Metal Nanocomposites ◽  
Matrix Nanocomposite

The development of metal nanocomposites reinforced by carbon nanotubes (CNTs) remains a focus of the scientific community due to the growing need to produce lightweight advanced materials with unique mechanical properties. However, for the successful production of these nanocomposites, there is a need to consolidate knowledge about how reinforcement influences the matrix microstructure and which are the strengthening mechanisms promoting the best properties. In this context, this investigation focuses on the study of the reinforcement effect on the microstructure of an Ni-CNT nanocomposites produced by powder metallurgy. The microstructural evolution was analysed by electron backscattered diffraction (EBSD). The EBSD results revealed that the dispersion/mixing and pressing processes induce plastic deformation in the as-received powders. The dislocation structures produced in those initial steps are partially eliminated in the sintering process due to the activation of recovery and recrystallization mechanisms. However, the presence of CNTs in the matrix has a significant effect on the dislocation annihilation, thus reducing the recovery of the dislocation structures.

Effect of Heat Treatment on the Creep Properties of Ti-22Al-27Nb/TiB Composite

2007 ◽  
Vol 345-346 ◽  
pp. 545-548
Author(s):  
Satoshi Emura ◽  
Masuo Hagiwara
Keyword(s):  
Heat Treatment ◽  
Intermetallic Phase ◽  
Powder Metallurgy Method ◽  
Ingot Metallurgy ◽  
Creep Properties ◽  
Matrix Microstructure ◽  
Heat Treated ◽  
The Matrix ◽  
Annealing Heat Treatment ◽  
Annealing Heat

A TiB particulate-reinforced Ti-22Al-27Nb (mol%) alloy, based on the orthorhombic intermetallic phase, was prepared using gas atomization powder metallurgy method. In the as-atomized condition, extremely fine TiB particulates of less than 1-μm diameter and 5-μm length were dispersed in the matrix. After annealing heat treatment (heat treated at 1423 K with subsequent furnace cooling), this composite exhibited a lamellar matrix microstructure and showed better creep properties than a composite produced using conventional ingot metallurgy method, with coarse TiB particulates of 5-μm diameter and 40-μm length. Coarsening of the matrix microstructure and growth of TiB particulates occurred after annealing heat treatment at higher temperature (ca. 1473 K). Creep-resistance improvement was also observed, which seemed to be mainly attribute to the effect of the matrix microstructure. From measurements of stress components and activation energy, all composites showed an identical creep mechanism: dislocation-controlled creep.

Fatigue Characteristic of Spheroidal Vanadium Carbides Cast Iron

2010 ◽  
Vol 457 ◽  
pp. 279-284 ◽  
Author(s):  
Masahito Tanaka ◽  
Kazumichi Shimizu ◽  
Daijiro Ito ◽  
Toru Noguchi
Keyword(s):  
Cast Iron ◽  
Fracture Surface ◽  
Fatigue Fracture ◽  
Vanadium Carbide ◽  
High Hardness ◽  
Fatigue Characteristic ◽  
Matrix Microstructure ◽  
Secondary Cracks ◽  
The Matrix ◽  
Vanadium Carbides

The purpose of this study is to investigate the fatigue characteristic and fatigue fracture mechanism of the high V-Cr-Ni spheroidal carbide cast iron (SCI-VCrNi) with spheroidal vanadium carbide (VC) dispersed within austenitic stainless matrix microstructure. The SCI-VCrNi that has high hardness was developed by 10mass%V adding to 18-8 stainless steel with spheroidal VC is distributed in the matrix. Firstly from the plane bending, the fatigue limit σw has been found to the 358MPa of SCI-VCrNi. Secondly, fracture surface observations were performed to clarify the fatigue mechanism of SCI-VCrNi. The fracture surface of SCI-VCrNi was so rough that the beach mark could not be observed. So, SEM was employed to observe, the fatigue fracture surface which showed a particular fatigue pattern. Also, many fracture cracks of VC were observed. In addition, the secondary cracks are shown at the interface between VC and the matrix. It can be suggested that the bondability between VC and the matrix is strong, and therefore, the propagation of cracks was delayed by the breakage of VC.

Influence of Al–Al2O3 composite powder on the matrix microstructure in composite casts

2002 ◽  
Vol 49 (2) ◽  
pp. 165-169 ◽  
Author(s):  
Anita Olszówka-Myalska ◽  
Janusz Szala ◽  
Józef Śleziona ◽  
Bolesław Formanek ◽  
Jerzy Myalski
Keyword(s):  
Composite Powder ◽  
Matrix Microstructure ◽  
Al2o3 Composite ◽  
The Matrix

High Performance Unalloyed Ductile Cast Iron with Multiphase Structure

2019 ◽  
Vol 295 ◽  
pp. 43-48
Author(s):  
Wen Tao Zhou ◽  
Chen Yang ◽  
Xi Xi Cui ◽  
Zhong Yang Liang ◽  
Xuan Wang ◽  
...  
Keyword(s):  
Cast Iron ◽  
Retained Austenite ◽  
High Performance ◽  
Bainitic Ferrite ◽  
Rapid Quenching ◽  
Ductile Cast Iron ◽  
Fine Needle ◽  
Multiphase Structure ◽  
Matrix Microstructure ◽  
The Matrix

An unalloyed ductile cast iron with a multiphase structure is designed by a novel austempering process. The designed austempering treatment consists of initial rapid quenching to 180°C after austenizing at 890°C for 20min, and finally austempering at 220°C for 240min. A multiphase structure comprising lenticular/needle-like prior martensite, fine needle bainitic ferrite and film retained austenite is obtained. The excellent mechanical properties, with a tensile strength of 1530MPa and an elongation of 3.1% can be achieved by controlling the matrix microstructure of 12% prior martensite, 15% retained austenite with 1.64% carbon content, and 73% bainitic ferrite. This is mainly attributed to prior marteniste which can promote refinement of multiphase colonies.

Microstructure Evolution of In Situ Synthesized VC Reinforced Iron Matrix Composites

2012 ◽  
Vol 217-219 ◽  
pp. 71-74
Author(s):  
Jing Wang ◽  
Si Jing Fu ◽  
Shu Yong Jiang ◽  
Hong Cheng
Keyword(s):  
Electron Microscopy ◽  
In Situ Synthesis ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
Iron Matrix ◽  
X Ray ◽  
Matrix Microstructure ◽  
The Matrix ◽  
Scanning Electron

Iron matrix composite reinforced with VC reinforcements was produced by in situ synthesis technique. The microstructure of the composites was characterized by X-ray diffraction and scanning electron microscopy. The micrographs revealed the morphology and distribution of the reinforcements. The results show that the composite consists of VC carbide as the reinforcing phase and α-Fe as the matrix. The distribution of spherical VC particulates in iron matrix is uniform, and the matrix microstructure of Fe-VC composite is pearlite.

scholarly journals Effect of Ga on the Inoxidizability and Wettability of Sn-0.5Ag-0.7Cu-0.05Pr Solder

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Xu Jiachen ◽  
Xue Songbai ◽  
Luo Dongxue ◽  
Wang He ◽  
Xue Peng
Keyword(s):  
Oxidation Resistance ◽  
Trace Amount ◽  
Molten Solder ◽  
Matrix Microstructure ◽  
The Matrix ◽  
The Relationship

The effect of trace amount of Ga on the inoxidizability and wettability of Sn-0.5Ag-0.7Cu-0.05Pr solders was investigated systematically by means of microstructure characterizations. The results indicate that the wettability and oxidation resistance properties are remarkably improved with addition of trace amount of Ga. Moreover, it is observed that the trace amount of Ga in Sn-0.5Ag-0.7Cu-0.05Pr solders refines the matrix microstructure. The relationship between wettability and oxidation resistance was put into deep study. And Ga was found to be enriched on the surface of the molten solder, which benefited the properties correspondingly. The results of this study can stimulate the use of low-silver Sn-Ag-Cu-Pr solders for various applications.

Sign in / Sign up

Export Citation Format

Share Document