scholarly journals The Effect of Fe Addition on the Mechanical Properties of Ti–6Al–4V Alloys Produced by the Prealloyed Powder Method

2016 ◽  
Vol 57 (5) ◽  
pp. 681-685 ◽  
Author(s):  
Osamu Kanou ◽  
Nobuo Fukada ◽  
Masashi Hayakawa
Keyword(s):  
Mechanical Properties ◽  
Prealloyed Powder ◽  
Powder Method ◽  
Fe Addition

The effect of Fe addition on processing and mechanical properties of reaction infiltrated boron carbide-based composites

2007 ◽  
Vol 42 (16) ◽  
pp. 6923-6928 ◽  
Author(s):  
I. Mizrahi ◽  
A. Raviv ◽  
H. Dilman ◽  
M. Aizenshtein ◽  
M. P. Dariel ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Boron Carbide ◽  
Fe Addition

scholarly journals Development of New 14 Cr ODS Steels by Using New Oxides Formers and B as an Inhibitor of the Grain Growth

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1344
Author(s):  
Alberto Meza ◽  
Eric Macía ◽  
Andrea García-Junceda ◽  
Luis Antonio Díaz ◽  
Paul Chekhonin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Grain Growth ◽  
Electron Backscatter Diffraction ◽  
Oxide Dispersion Strengthened ◽  
Complex Oxide ◽  
Tensile Tests ◽  
Processing Route ◽  
Prealloyed Powder ◽  
Ods Steel ◽  
Ods Steels

In this work, new oxide dispersion strengthened (ODS) ferritic steels have been produced by powder metallurgy using an alternative processing route and characterized afterwards by comparing them with a base ODS steel with Y2O3 and Ti additions. Different alloying elements like boron (B), which is known as an inhibitor of grain growth obtained by pinning grain boundaries, and complex oxide compounds (Y-Ti-Zr-O) have been introduced to the 14Cr prealloyed powder by using mechanical alloying (MA) and were further consolidated by spark employing plasma sintering (SPS). Techniques such as x-ray diffraction (XRD), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM) were used to study the obtained microstructures. Micro-tensile tests and microhardness measurements were carried out at room temperature to analyze the mechanical properties of the differently developed microstructures, which was considered to result in a better strength in the ODS steels containing the complex oxide Y-Ti-Zr-O. In addition, small punch (SP) tests were performed to evaluate the response of the material under high temperatures conditions, under which promising mechanical properties were attained by the materials containing Y-Ti-Zr-O (14Al-X-ODS and 14Al-X-ODS-B) in comparison with the other commercial steel, GETMAT. The differences in mechanical strength can be attributed to the precipitate’s density, nature, size, and to the density of dislocations in each ODS steel.

Microstructures and properties of direct laser sintered tungsten carbide (WC) particle reinforced Cu matrix composites with RE–Si–Fe addition: A comparative study

2009 ◽  
Vol 24 (11) ◽  
pp. 3397-3406 ◽  
Author(s):  
Dongdong Gu ◽  
Yifu Shen
Keyword(s):  
Mechanical Properties ◽  
Comparative Study ◽  
Tungsten Carbide ◽  
High Performance ◽  
Chemical Properties ◽  
Particle Dispersion ◽  
Matrix Composites ◽  
Direct Laser ◽  
Interfacial Compatibility ◽  
Fe Addition

The poor wettability between ceramics and metals is a main obstacle in obtaining high-performance metal-matrix composites (MMCs) parts using direct metal laser sintering (DMLS). Rare earth (RE) elements, due to their unique physical and chemical properties, have high potential for improving laser processability of MMCs. In this work, a comparative study was performed to investigate the influence of RE–Si–Fe addition on microstructural features and mechanical properties of DMLS processed tungsten carbide (WC) particle reinforced Cu MMCs parts. It showed that by adding 3 wt% RE–Si–Fe, the WC reinforcing particles were refined, the particle dispersion state was homogenized, and the particle/matrix interfacial compatibility was enhanced. The RE–Si–Fe-containing WC/Cu MMCs parts possessed significantly elevated mechanical properties, i.e., densification level of 95.7%, microhardness of 417.6 HV, fracture strength of 201.8 MPa, and friction coefficient of 0.8. The metallurgical functions of the RE–Si–Fe additive for the improvement of DMLS quality of MMCs parts were discussed.

Characterization and Properties of Copper-Silica Sand Nanoparticle Composites

2011 ◽  
Vol 319-320 ◽  
pp. 95-105 ◽  
Author(s):  
Tahir Ahmad ◽  
Othman Mamat
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Plastic Deformation ◽  
Powder Metallurgy ◽  
Silica Sand ◽  
Prealloyed Powder ◽  
Powder Metallurgy Process ◽  
Rearrangement Mechanism ◽  
Nanoparticle Composites ◽  
Metallurgy Process

Copper-based microcomposites fabricated by powder metallurgy with subsequent plastic deformation have received increasing attention over recent years. These microcomposites possess good electrical conductivity in combination with high mechanical properties. The present study aims to explore potential technical merits in developing a prealloyed powder metallurgy copper based composites with silica sand nanoparticles reinforcement. Relevant mechanical properties and electrical conductivity improvements are the main targets. A copper based composite with 5, 10, 15 and 20 wt.% of silica sand nanoparticles were developed through the powder metallurgy process. It was observed that by addition of silica sand nanoparticles with 20% increased the hardness up to 143HV. Optimum electrical conductivity of the composites was achieved in the 15 wt.% silica sand nanoparticles. Advanced particle rearrangement mechanism due to homogeneous and fine distribution of silica sand nanoparticles into pore sites of the composites was also observed. The silica sand nanoparticles composites properties that are much more surface-related seen to be improved convincingly compared with the bulk controlled.

Modification of Low Alloyed Steels by Manganese Additions

2007 ◽  
Vol 534-536 ◽  
pp. 697-700 ◽  
Author(s):  
J. Sicre-Artalejo ◽  
Mónica Campos ◽  
Teodora Marcu ◽  
José M. Torralba
Keyword(s):  
Mechanical Properties ◽  
Master Alloy ◽  
Oxygen Affinity ◽  
High Energy ◽  
Alloying Elements ◽  
Sintering Behavior ◽  
Mechanically Alloyed ◽  
Prealloyed Powder ◽  
High Oxygen Affinity ◽  
The Cost

The efforts to increase the potential PM market [makes necessary to accept new challenges to develop new products. To address this question, we can consider modifying the pores system or the material composition and at same time, the cost of the alloying elements and the compromise between strength, tolerances and cost. The present study examines the sintering behavior and effect of manganese addition, both mechanically-blended and mechanically alloyed, on Cr-Mo low alloyed steels to enhance the mechanical properties. Mn sublimation during sintering results in some specific phenomena to occur which facilitate the sintering of alloying elements with high oxygen affinity. To benefit from the Mn sublimation effects, small Mn particles must be homogenously added in order to increase the specific surface available to sublimate. First, the milling time is optimized to attain a master alloy with 50% of Mn that is diluted in Fe-1.5Cr-0.2Mo water atomized prealloyed powder by normal mixing. These mixtures were pressed to a green density of 7.1 g/cm3 and sintered at 1120 °C in 90N2-10H2 atmosphere. The resulting mechanical properties and the microstructures are discussed considering the high energy stored in the master alloy which favors the mass transport mechanism during sintering.

Enhancement on GFA and mechanical properties of Ni-based bulk metallic glasses through Fe addition

2017 ◽  
Vol 90 ◽  
pp. 58-62 ◽  
Author(s):  
Xu Ma ◽  
Qiang Li ◽  
Liang Chang ◽  
Chuntao Chang ◽  
Hongxiang Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Fe Addition

scholarly journals Microstructure and densification behavior of liquid phase sintered Cu-28Zn prealloyed powder

2013 ◽  
Vol 45 (3) ◽  
pp. 351-362 ◽  
Author(s):  
Namini Sabahi ◽  
M. Azadbeh ◽  
A. Mohammadzadeh
Keyword(s):  
Mechanical Properties ◽  
Liquid Phase ◽  
Chemical Analysis ◽  
Microstructural Evolution ◽  
Sintering Temperature ◽  
Gravitational Effect ◽  
Densification Behavior ◽  
Brass Alloy ◽  
Prealloyed Powder

The present study investigates the effect of sintering temperature on densification behavior and properties of liquid phase sintered Cu-28Zn brass alloy. Microstructural evolution, chemical analysis and mechanical properties measurements have been studied in details. Obtained results allowed to accurately evaluating the sintering characteristic of this alloy. It is especially relevant in sintered samples that exhibits a pronounced variation of microstructure from top to down part of the specimens and consequently graded densification which was due to gravitational effect.

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