Fabrication of Mg-Al alloy foam with close-cell structure by powder metallurgy approach and its mechanical properties

2016 ◽  
Vol 22 ◽  
pp. 290-296 ◽  
Author(s):  
Donghui Yang ◽  
Zhongyun Hu ◽  
Weiping Chen ◽  
Jun Lu ◽  
Jianqing Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Cell Structure ◽  
Al Alloy ◽  
Powder Metallurgy Approach ◽  
Al Alloy Foam

Micro-Porous Nickel Produced by Powder Metallurgy

2007 ◽  
Vol 534-536 ◽  
pp. 977-980
Author(s):  
Yasuo Yamada ◽  
Yun Cang Li ◽  
Takumi Banno ◽  
Zhen Kai Xie ◽  
Cui E Wen
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Porous Structure ◽  
Pore Size ◽  
Cell Structure ◽  
Deformation Behaviour ◽  
Average Pore Size ◽  
Chemical Vapour ◽  
Porous Nickel ◽  
Average Pore

Micro-porous nickel (Ni) with an open cell structure was fabricated by a special powder metallurgical process, which includes the adding of a space-holding material. The average pore size of the micro-porous Ni samples approximated 30 μm and 150 μm, and the porosity ranged from 60 % to 80 %. The porous characteristics of the Ni samples were observed using scanning electron microscopy (SEM) and the mechanical properties were evaluated using compressive tests. For comparison, porous Ni samples with a macro-porous structure prepared by both powder metallurgy (pore size 800 μm) and the traditional chemical vapour deposition (CVD) method (pore size 1300 μm) were also presented. Results indicated that the porous Ni samples with a micro-porous structure exhibited different deformation behaviour and dramatically increased mechanical properties, compared to those of the macro-porous Ni samples.

scholarly journals The Structural and Mechanical Properties of MoS2-TiB2 Coated on AA7075 Produced by Powder Metallurgy Method

2019 ◽  
Vol 1 (2) ◽  
pp. 11-14
Author(s):  
Taha Alper Yılmaz
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Composite Films ◽  
Al Alloys ◽  
Al Alloy ◽  
Powder Metallurgy Method ◽  
Pressing Pressure ◽  
Powder Metal ◽  
Wear Properties ◽  
Space Conditions

AA7075 Al alloys are widely used in the aerospace industry. However, the mechanical properties of these alloys are insufficient in space conditions. AA7075 Al alloy is produced by powder metallurgy method due to the good wear properties. Then AA7075 Al alloys have to be adapted to mechanical properties MoS2-TiB2 composite films are deposited. MoS2-TiB2 composite films were grown on powder metal substrate using CFUBMS method in three different MoS2 target currents. Structural properties of composite films were analyzed by SEM, XRD and XPS methods. The mechanical properties of the films are carried out by microhardness and scratch tester. The best grade value of AA7075 powder metal alloy was made with 800MPa pressing pressure and increased from 2.61g/cm3 to 2.72g/cm3 after sintering. The highest hardness was obtained at the lowest MoS2 target voltage of 4.7GPa. The highest critical load value was obtained as 26N at the highest MoS2 target voltage.

Effect of Solution Heat Treatment on Microstructure and Mechanical Properties of Al Alloy FOAM

2005 ◽  
Vol 475-479 ◽  
pp. 437-440
Author(s):  
Sang Min Lee ◽  
K. Ryu ◽  
Young Jae Kwon ◽  
J.G. Kim ◽  
Won Seung Cho ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Solution Heat Treatment ◽  
Al Alloy ◽  
Microstructure And Mechanical Properties ◽  
Al Alloy Foam

Microstructure and Mechanical Properties of α’ Martensite Type Ti-V-Al Alloy after Cold- or Hot Working Process

2010 ◽  
Vol 436 ◽  
pp. 171-177 ◽  
Author(s):  
Hiroaki Matsumoto ◽  
Hiroshi Yoneda ◽  
Kazuhisa Sato ◽  
Toyohiko J. Konno ◽  
Shingo Kurosu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cell Structure ◽  
High Strength ◽  
Hot Working ◽  
Al Alloy ◽  
Working Process ◽  
Initial Microstructure ◽  
Ti Alloys ◽  
Microstructure And Mechanical Properties ◽  
New Type

Ti alloys are widely utilized for industrial applications due to their excellent mechanical properties combined with low density. In general, Ti alloys are classified as , + and  alloys, with further subdivision into near  and metastable  alloys. Quite recently, we have presented new type structural ’ martensite (H.C.P.) Ti alloys with low Young’s modulus, high strength and excellent ductility at room temperature. In this work, we examined the microstructure and mechanical properties of ’ martensite type Ti-V-Al alloy after cold- or hot working process. Then, we found that deformation behavior of ’ initial microstructure as compared with (+) initial microstructure was different based on the results of stress-strain curves and Processing Maps under the hot working process. Further, cold rolled ’ martensite microstructure exhibited the refined equiaxed dislocation cell structure, thereby resulting in high strength. This result suggests the new type deformation processing (for both cold- and hot work processing) utilizing ’ martensite in industrial Ti alloys.

Mechanical Properties and Energy Absorption Capability of Closed-Cell Al Alloy Foam

2012 ◽  
Vol 450-451 ◽  
pp. 325-328
Author(s):  
Wei Han Yang ◽  
Zhan Guang Wang ◽  
Ping Cai ◽  
Jing Zhi Hu
Keyword(s):  
Mechanical Properties ◽  
Energy Absorption ◽  
Al Alloy ◽  
Closed Cell ◽  
Al Alloy Foam

scholarly journals Fabrication of Ni-NiO Foams by Powder Metallurgy Technique and Study of Bulk Crushing Strength

2021 ◽  
Vol 18 (23) ◽  
pp. 683
Author(s):  
Bappi Sarker ◽  
Md. Arafat Rahman ◽  
Md. Mizanur Rahman ◽  
Md. Saiful Islam
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Pore Diameter ◽  
Sintering Temperature ◽  
Cell Structure ◽  
Powder Metallurgy Technique ◽  
Crushing Strength ◽  
Crushing Force ◽  
Different Types ◽  
Crystallite Sizes

Despite the importance of Nickel Oxide (NiO) in diverse functional applications, very little information is available on the mechanical properties of bulk or porous NiO or, mostly unnoticed. In this study, porous Ni-NiO foam was synthesized using space holding-powder metallurgy and sintering methods to produce opened-cell structure with macrogravel and Neolamarckia cadamba (Cadamba flower) like surface morphology. Four different types of porous Ni-NiO with different pore diameter of 35.65 ± 12.77, 36.10 ± 8.85, 68.20 ±7.36 and 62.45 ± 17.48 µm were fabricated for evaluating the effect of porosity on the mechanical properties of bulk porous Ni-NiO foam. The mechanical properties such as bulk crushing force of as synthesized Ni-NiO foam with various porosities such as 20.55, 27.35, 27.85 and 28.82 % exhibited the average crushing load of 115.40, 39.95, 138.10 and 151.20 N, respectively. This study suggests that crushing load of Ni-NiO foam is not only depending on the porosity but also on the sintering temperature and crystallite sizes of NiO. HIGHLIGHTS Ni-NiO foam is synthesized using space holding-powder metallurgy and sintering methods Different pore diameter is fabricated for evaluating the effect of porosity on the mechanical properties of bulk porous Ni-NiO foam Crushing strength of Ni-NiO foam is not only depending on the porosity but also on the sintering temperature and crystallite sizes of NiO GRAPHICAL ABSTRACT

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