scholarly journals Characterization of Crater Area in a Target Penetrated by a Wf/Zr-Based Amorphous Matrix Composite Projectile

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5523
Author(s):  
Xianghai Ye ◽  
Minming Zou ◽  
Jiankang Chen
Keyword(s):  
Matrix Composite ◽  
Amorphous Matrix ◽  
Target Material ◽  
Original Structure ◽  
Matrix Composites ◽  
Micro Hardness ◽  
Hardness Tester ◽  
Ballistic Experiment ◽  
Martensite Layer ◽  
Penetration Behavior

Tungsten fiber-reinforced Zr41.25Ti13.75Cu12.5Ni10Be22.5 amorphous matrix composites (hereinafter referred to as Wf/Zr-based amorphous matrix composites) are considered as a potential new generation of projectile material, while the penetration behavior of Wf/Zr-based amorphous matrix composites is not fully clear yet. In order to better understand the penetration behavior of this composite material and study its armor-piercing performance, a ballistic experiment was performed and the hardness and microstructure around the crater of a target material were studied. A ballistic experiment was performed with a projectile of Wf/Zr-based amorphous matrix composite and a target of 4043 steel. After the ballistic experiment, the target was cut through the crater using a wire cutting machine into a sample with size 150 mm × 40 mm × 20 mm, which was later polished by different types of sandpaper. The micro-hardness was analyzed in a micro-hardness tester, and the microstructure was observed by SEM. According to this study, three layers were identified in the direction lateral to the crater, consisting of a martensite layer, a deformation strengthening layer, and the original structure layer. Moreover, the martensite layer initially thickened and then thinned in the direction longitudinal to the crater.

Influence of Temperature Rise in Penetration of Wf/Zr-Based Amorphous Matrix Composite Projectile on Target Material

2014 ◽  
Vol 496-500 ◽  
pp. 210-215
Author(s):  
Xiang Hai Ye ◽  
Hong Gang Shi ◽  
Min Ming Zou ◽  
Kai Wen Tian ◽  
Li Jun Zhu ◽  
...  
Keyword(s):  
Matrix Composite ◽  
Temperature Rise ◽  
Martensite Transformation ◽  
Amorphous Matrix ◽  
Hot Spot ◽  
Engineering Application ◽  
Target Material ◽  
Influence Of Temperature ◽  
Hardness Tester ◽  
Penetration Mechanism

Wf/Zr-based amorphous matrix composite is supposed as a potential penetrator material of armor-piercing projectile because it has both advanced piercing performance and environmentally friendly property, and it becomes the hot spot of science study and engineering application. To get a deeper understand of the penetration mechanism and the influence of temperature rise on structure of target, target which is penetrated by penetrator made of Wf/Zr-based amorphous matrix composite is studied by SEM and micro-hardness tester. Oxidation of back of target is severe, and Martensite transformation happens around the crater. From the crater surface to the interior of the steel target, the section can be divided into 3 layers: the Martensite layer, the deformed fine grain layer and the normal matrix. Martensite transformation indicates the target steel around crater is heated and softened in penetration, so this phenomenon is beneficial to penetrate and get a deeper understand of the penetration mechanism. CLC: TJ04 Document code: A

scholarly journals Penetration Behavior of Wp/Zr-based Amorphous Matrix Composite

2020 ◽  
Vol 1637 ◽  
pp. 012025
Author(s):  
Xiaohong Su ◽  
Huie Hu ◽  
Xiaodong Kong ◽  
Jingxin Deng
Keyword(s):  
Matrix Composite ◽  
Amorphous Matrix ◽  
Penetration Behavior

Impact of Original Micro-Structure on Grind-Hardened Layer of 42CrMo Steel in Grind-Hardening

2016 ◽  
Vol 878 ◽  
pp. 22-27
Author(s):  
Gui Cheng Wang ◽  
Bin Jiao ◽  
Jun Feng Zou ◽  
Hong Jie Pei
Keyword(s):  
Middle Layer ◽  
Transitional Zone ◽  
Hardened Layer ◽  
Original Structure ◽  
Micro Hardness ◽  
Hardness Tester ◽  
Hardened Zone ◽  
42Crmo Steel ◽  
Grind Hardening ◽  
Grinding Machine

The grind-hardening test of 42CrMo steel was carried out on a forming grinding machine. The macrostructure, microstructures, micro-hardness and the depth of the hardened layer were measured and analyzed by optical micro-scope, scanning electron microscope and digital micro-hardness tester. The influences of original microstructure on the grind-hardened layer of 42CrMo steel were studied. The results show that the acicular martensite and a small amount of undissolved carbide appear in the surface layer, and slightly coarse martensite and a small amount of undissolved carbide appear in the middle layer of the completely hardened zone. Microstructure of the transitional zone varies with original structure. The microstructures and micro-hardness of the completely hardened zone have no obvious change under different original organizations, and the micro-hardness is 620HV0.5-700HV0.5. However, the distance from the slightly coarse martensite and the depth of the hardened layer increase with the uniformity improvement of the original microstructure.

Change Regulation of Hardness of Target around Crater Penetrated by Wf/Zr-Based Amorphous Matrix Composite Projectile

2014 ◽  
Vol 941-944 ◽  
pp. 251-256
Author(s):  
Xiang Hai Ye ◽  
Hong Gang Shi ◽  
Min Ming Zou ◽  
Kai Wen Tian ◽  
Jin Bo Liu ◽  
...  
Keyword(s):  
Matrix Composite ◽  
Amorphous Matrix ◽  
Hot Spot ◽  
Engineering Application ◽  
Science Study ◽  
Firing Test ◽  
Fine Grain ◽  
Steel Target ◽  
Martensite Layer ◽  
Physical And Chemical

Because of excellent mechanical, physical and chemical property Wf/Zr-based amorphous matrix composite attracts people’s interest and becomes the hot spot of science study and engineering application. In this paper, change regulation of hardness of target around crater by Wf/Zr-based amorphous matrix composite projectile and its mechanism are studied after firing test, and it is found that the section can be divided into 3 layers: the Martensite layer, the deformed fine grain layer and the normal matrix from the crater surface to the interior of the steel target and that the thickness of Martensite layer increases first and then decreases in the penetration direction when the velocity of projectile is 1200m/s.

Macro-Model for Development of Al-SiC Metal Matrix Composite with Vacuum Moulding: Designed Experiments

2013 ◽  
Vol 751 ◽  
pp. 21-26 ◽  
Author(s):  
Jaswinder Singh ◽  
Rupinder Singh
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Dimensional Accuracy ◽  
Matrix Composites ◽  
Micro Hardness ◽  
Taguchi Technique ◽  
Designed Experiments ◽  
Macro Model ◽  
Vacuum Moulding

Metal matrix composites (MMC) have many potential engineering applications. Not much work hitherto has been reported for development of Al based MMC with vacuum moulding (VM) process. In this work; Aluminum (Al) based MMC has been developed with VM. An approach to macro-model the micro hardness and dimensional accuracy for development of Al-SiC, MMC has been proposed and applied during VM process. Relationship between micro hardness, dimensional accuracy and other input parameters of VM process has been deduced by using Taguchi technique. The comparison with experimental results will also serve as a future validation of the model.

TEM examination of 2014-SiC metal matrix composite

1988 ◽  
Vol 46 ◽  
pp. 726-727
Author(s):  
M. G. Burke ◽  
M. N. Gungor ◽  
P. K. Liaw
Keyword(s):  
Metal Matrix Composite ◽  
Metal Matrix Composites ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Tensile Deformation ◽  
Microstructural Characterization ◽  
Thin Foil ◽  
Matrix Alloy ◽  
Matrix Composites ◽  
Ion Milling

Aluminum-based metal matrix composites offer unique combinations of high specific strength and high stiffness. The improvement in strength and stiffness is related to the particulate reinforcement and the particular matrix alloy chosen. In this way, the metal matrix composite can be tailored for specific materials applications. The microstructural characterization of metal matrix composites is thus important in the development of these materials. In this study, the structure of a p/m 2014-SiC particulate metal matrix composite has been examined after extrusion and tensile deformation.Thin-foil specimens of the 2014-20 vol.% SiCp metal matrix composite were prepared by dimpling to approximately 35 μm prior to ion-milling using a Gatan Dual Ion Mill equipped with a cold stage. These samples were then examined in a Philips 400T TEM/STEM operated at 120 kV. Two material conditions were evaluated: after extrusion (80:1); and after tensile deformation at 250°C.

Quasi-static penetration behavior of fiber-reinforced polypropylene and acrylonitrile butadiene styrene matrix composites

2021 ◽  
pp. 089270572110079
Author(s):  
Ali İmran Ayten
Keyword(s):  
Glass Fiber ◽  
Energy Absorption ◽  
Matrix Material ◽  
Acrylonitrile Butadiene Styrene ◽  
Fiber Types ◽  
Matrix Composites ◽  
Aramid Fabric ◽  
Penetration Behavior ◽  
Fiber Fabric ◽  
Butadiene Styrene

The quasi-static punch shear behaviors of thermoplastic composites with different polymer matrices and fiber types were investigated. This study was also focused on how much energy absorption capability can be increased by low fiber fractions. Maleic anhydride grafted polypropylene (MA-g-PP) and acrylonitrile butadiene styrene (MA-g-ABS) were used as the matrix material. One layer of aramid, carbon and glass fiber plain weave fabrics was used as the reinforcement material. Quasi-static punch shear test (QS-PST) was applied to the samples to understand the penetration behavior of the samples. The damaged areas were investigated and related to force-displacement curves. The results showed that the neat form of MA-g-PP exhibited 158% more energy absorption than the neat form of MA-g-ABS. In the samples containing one layer of fabric, the highest improvement was observed in the aramid fabric-reinforced MA-g-ABS matrix composites. Aramid fabric increased the energy absorption at a rate of 142.3% in comparison to the neat MA-g-ABS, while carbon fiber fabric and glass fiber fabric increased it by 40% and 63.52%, respectively. Aramid fiber fabric provided no significant improvement in the energy absorption in the MA-g-PP matrix composites, while carbon and glass fiber fabrics contributed to energy absorption at a rate of 48% and 41%, respectively.

Microstructure and Grain Abrasion Properties of Cr3C2-NiCr Coating Prepared by Laser Cladding Method

2012 ◽  
Vol 271-272 ◽  
pp. 3-7
Author(s):  
Long Wei ◽  
Zong De Liu ◽  
Xin Zhi Li ◽  
Ming Ming Yuan ◽  
Cheng Yuan Zhong
Keyword(s):  
Wear Resistance ◽  
Wear Rate ◽  
Laser Cladding ◽  
Micro Hardness ◽  
High Quality ◽  
Wear Resistant ◽  
Hardness Tester ◽  
Technology Analysis ◽  
Main Component

Cr3C2-NiCr has high quality of wear resistant properties and is widely used in abrasive environment. In this paper, Cr3C2-NiCr coating was prepared on 45 steel by laser cladding technology. Analysis and research of the coatings were achieved by SEM and XRD to determine the main component and the different region on coatings. The hardness and the element component were investigated by micro-hardness tester and EDS. Abrasion tests were performed to contrast the wear resistance of two materials. The results indicate that the hardness of the coatings is nearly 3 times as the substrate. The coatings are well combined with the substrate and the phase of Cr3C2 has a large proportion in the coatings. Abrasion tests show that the average of wear rate on substrate is 5.2 times as the coatings.

scholarly journals Measurement of Elastic Modulus and Yield Stress by AFM Ultra-Micro-Hardness Tester.

1996 ◽  
Vol 62 (598) ◽  
pp. 1432-1437 ◽  
Author(s):  
Saburo MATSUOKA ◽  
Kensuke MIYAHARA ◽  
Nobuo NAGASHIMA ◽  
Kohichi TANAKA
Keyword(s):  
Elastic Modulus ◽  
Yield Stress ◽  
Micro Hardness ◽  
Hardness Tester
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