scholarly journals Some Mechanical Properties of Experimental Mg-Al -RE-Mn Magnesium Alloys

2014 ◽  
Vol 14 (1) ◽  
pp. 13-16 ◽  
Author(s):  
K.N. Braszczyńska-Malik
Keyword(s):  
Mechanical Properties ◽  
Rare Earth ◽  
Impact Strength ◽  
Rare Earth Elements ◽  
Mass Fraction ◽  
Brinell Hardness ◽  
Mechanical Tests ◽  
Gravity Casting ◽  
Compression Properties ◽  
The Impact

Abstract The results of some mechanical properties of four Mg-5Al-xRE-0.4Mn (x = 1 - 5) alloys are presented. The microstructure of experimental alloys consisted of an α-Mg phase and an α+γ semi-divorced eutectic, Al11RE3 phase and an Al10RE2Mn7 intermetallic compound. For gravity casting in metal mould alloys, Brinell hardness, impact strength, tensile and compression properties at ambient temperature were determined. The performed mechanical tests allowed the author to determine the proportional influence of the mass fraction of rare earth elements in the alloys on their tensile strength, yield strength, compression strength and Brinell hardness. The impact strength of the alloys slightly decreases with a rise in the rare earth elements mass fraction.

scholarly journals Effect of B4C particle size on the mechanical properties of B4C reinforced aluminum matrix layered composite

2019 ◽  
Vol 26 (1) ◽  
pp. 53-61 ◽  
Author(s):  
Guangye Xu ◽  
Yingshui Yu ◽  
Yubo Zhang ◽  
Tingju Li ◽  
Tongmin Wang
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Impact Strength ◽  
Mass Fraction ◽  
Ceramic Composites ◽  
Reinforcement Particle ◽  
The Impact ◽  
B4c Particle

Abstract Reinforcement particle size is very important for the performance of metal ceramic composites. This work studied the influence of B4C particle size on the mechanical properties of Al matrix layered composites. These composites were fabricated using a simplified semicontinuous casting and hot-rolling process. To obtain an optimized filling structure of particles, Horsfield filling principle was applied to determine the size and mass fraction of B4C particles. Four sizes of B4C particles were used with various combinations. The results showed that with the increase of the B4C particle size and fine B4C mass fraction, the hardness of the composites decreases whereas the impact strength and ultimate tensile strength increase. The residual stress at interface should be responsible for the variation in properties. Besides, the interparticle distance also contributes to the change in impact strength and ultimate tensile strength.

Mechanical properties of cured epoxy resin

2021 ◽  
Author(s):  
Sergey Savotchenko ◽  
Ekaterina Kovaleva
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Impact Strength ◽  
Epoxy Resin ◽  
Mass Fraction ◽  
Mechanical Characteristics ◽  
Bending Strength ◽  
The Impact ◽  
Impact Viscosity

We study experimentally the influence of mass fraction of L-20 hardener cold cure on mechanical properties of epoxy diane resin ED-20. We measure the hardness, tensile strength, bending strength and impact strength of resin at different values of the hardener mass fraction. It is found that the ratio hardener mass fraction of 1:0.9 leads to the highest values of the hardness, tensile strength, compressive strength and bending strength. The impact viscosity is maximum at the ratio hardener mass fraction of 1:0.8. The optimal ratio of a non-toxic safe hardener to the resin is derived based on obtained mechanical characteristics.

scholarly journals Investigation on Mechanical Properties of Graphene Reinforced Jute Fibre Reinforced Polymer Composites

2020 ◽  
Author(s):  
Rathinasabapathi G ◽  
Krishnamoorthy A
Keyword(s):  
Mechanical Properties ◽  
Fatigue Strength ◽  
Impact Strength ◽  
Mechanical Tests ◽  
Layered Composite ◽  
Fiber Reinforced Polymer ◽  
Jute Fibre ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
The Impact

In this study, the impact of adding Graphene Nano Platelets on the mechanical properties of Jute Fiber reinforced Polymer (JFRP) composites has been investigated. JFRP composite specimens were fabricated with varying number of layers (3 Layers, 4 Layers, and 5 Layers) and different orientations (30 degree, 45 degree, 60 degree) reinforced with 2% weight graphene nano platelet. Ultrasonicator is used for dispersion of graphene nano platelets into the epoxy matrix. Mechanical Tests namely Tensile test, flexural test and impact test is carried out to study the behavior of JFRP with different layers and orientations. The results proved that the use of 2% weight of Graphene Nano platelets led an enhancement in fatigue strength and impact strength. Also it is found that 3 layered with 30 degree orientation composite specimens had better mechanical properties compared to 4 layered and 5 layered composite specimens.

scholarly journals INFLUENCE OF RARE-EARTH ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF HIGH MANGANESE STEEL UNDER IMPACT LOAD

2019 ◽  
Vol 25 (3) ◽  
pp. 158
Author(s):  
Nam Duong Nguyen ◽  
Nguyen Duong Nguyen ◽  
Khanh Mai Pham
Keyword(s):  
Mechanical Properties ◽  
Rare Earth ◽  
Impact Strength ◽  
Impact Load ◽  
Manganese Steel ◽  
High Manganese ◽  
High Manganese Steel ◽  
Microstructure And Mechanical Properties ◽  
The Impact ◽  
Better Than

<span class="fontstyle0">In this paper, the influence of rare earth (RE) on the microstructure and mechanical properties of austenitic high manganese steel (HMnS) Mn15Cr2V were investigated. The results showed that the microstructure, hardness and impact strength of RE modification sample is finer and better than non-modified sample. Under the effect of impact load, the hardness and the depth of the work-hardening layer of the modified steel was higher than that of the non-modified steel, thereby, the value of microhardness in the surface of the modified sample was 420 HV while it was only 395 HV in the non-modified sample. The value of the impact strength of the modified sample was up to 132J/cm</span><span class="fontstyle0">2 </span><span class="fontstyle0">compared to the non-modified sample is only 115J/cm</span><span class="fontstyle0">2</span><span class="fontstyle0">. Moreover, after impact load, the austenite nanoparticles had been found out on the surface of this steel, this is the cause of the increasing of mechanical properties in this steel.</span> <br /><br />

Research on the Mechanical Properties and Corrosion Resistance of Mg-RE and Mg-Zn-Cu Alloys

2014 ◽  
Vol 633-634 ◽  
pp. 82-85
Author(s):  
Xin Hong Xiong ◽  
Dun Miao Quan ◽  
Jia Lin Chen ◽  
Qiao Xin Zhang ◽  
Yun Chen
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Magnesium Alloys ◽  
Casting Process ◽  
Gravity Casting ◽  
Cu Alloys ◽  
Mechanical Properties And Corrosion

Rare earth magnesium alloys and Mg-Zn-Cu alloys were prepared by gravity casting and direct squeezing casting respectively, and the corrosion performances of three kinds of Mg-Zn-Cu alloys were compared in this paper. The results indicate that adding rare earth elements and direct squeezing casting process can significantly increase the mechanical properties of magnesium alloys, and aluminum can improve the corrosion resistance of magnesium alloys.

scholarly journals Synthesis and mechanical properties of nano-Sb2O3/BPS-PP composites

2020 ◽  
Vol 27 (1) ◽  
pp. 139-147
Author(s):  
Jianlin Xu ◽  
Jinqiang Zhao ◽  
Chenghu Kang ◽  
Lei Niu ◽  
Jianbin Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Mass Fraction ◽  
Molding Method ◽  
Blending Method ◽  
Pp Composites ◽  
Brominated Polystyrene ◽  
The Impact ◽  
Matrix Nanocomposites

AbstractIn view of the limitation of wide application of polypropylene(PP) with low strength, poor low-temperature brittleness and easy combustion, a kind of PP matrix nanocomposites was designed and prepared. Sb2O3 nanoparticles (nano-Sb2O3) modified by silane coupling agent of KH550 were dispersed into brominated polystyrene(BPS)-PP matrix by ball milling dispersion and melt blending method, respectively. And the nano-Sb2O3/BPS-PP composites samples were obtained by injection molding method. The effects of nano-Sb2O3 particles on mechanical properties of nano-Sb2O3/BPS-PP composites were investigated. The results showed that the surface of nano-Sb2O3 particles was successfully modified by the KH550 and the interfacial adhesion between nano-Sb2O3 and PP matrix was improved. With increasing of the mass fraction of nano-Sb2O3, the tensile strength and impact strength of nano-Sb2O3/BPS-PP composites were improved accompanying by increasing of crystallinity and refining grain of the composites. When the mass fraction of nano-Sb2O3 was 3 wt%, the tensile strength of nano-Sb2O3/BPS-PP composites was 43 MPa, which was 30.3% higher than that of PP. When the mass fraction of nano-Sb2O3 was 2 wt%, the impact strength of the composites was 44.19 kJ·m−2, which was 30.8% higher than that of PP.

scholarly journals Effects of Rare Earth Elements on Microstructure and Mechanical Properties of H13 Die Steel

Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 918
Author(s):  
Rongchun Chen ◽  
Zhigang Wang ◽  
Jianguo He ◽  
Fusheng Zhu ◽  
Chunhong Li
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Grain Boundaries ◽  
M23c6 Carbide ◽  
Die Steels ◽  
Carbide Distribution ◽  
Re Elements ◽  
The Impact

The effects of rare earth (RE) elements on the carbide distribution, transformation temperature, and mechanical properties of H13 die steels after annealing were systematically investigated by scanning electron microscopy, electron probe microanalysis, and transmission electron microscopy. The results indicated that the addition of RE elements is helpful in increasing the fraction of the disrupted M23C6 carbide along the grain boundaries, hindering the migration of grain boundaries and improving the crack-formation and expansion resistance of the carbides in the tensile process. With the addition of RE, the Ac3 temperature increased by 11.4 °C and the diffusion of carbon atoms was pinned during the austenitizing process. Moreover, the carbides were modified by rare earth elements, and RE-inclusion promoted the transition of brittle-type failure to ductile-type failure. Therefore, the impact energy, hardness, and ultimate tensile strength improved significantly in the RE-modified H13 die steels.

scholarly journals Effects of Rare Earth Elements (Ce, Y) on Microstructure and Mechanical Properties of P20 Die Steel

2021 ◽  
Vol 2101 (1) ◽  
pp. 012085
Author(s):  
Dan Wu ◽  
Qiang Hu ◽  
Wei Chen ◽  
Deping Lu ◽  
Jin Zou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Rare Earth ◽  
Impact Energy ◽  
Mechanical Tests ◽  
Strength Increase ◽  
Die Steels ◽  
Matrix Microstructure ◽  
Microstructure And Mechanical Properties ◽  
The Impact

Abstract Electroslag remelting P20 die steels with different amount of CeO2 or Y2O3 additions have been investigated by using mechanical tests and scanning electronic microscope with energy dispersive spectrometry. The microstructure of P20 die steels is tempered martensite, in which plenty of carbides precipitate along the martensite laths. With addition of rare earth Ce or Y, the matrix microstructure is refined, the quantity of carbides is decreased, and the distribution of carbides becomes more uniform. As a result of these microstructural changes, both the impact energy and tensile strength increase with increasing rare earth content. The samples obtain optimum microstructure and mechanical properties when the amount of CeO2 or Y2O3 additions reach 4 wt.%. However, over-added CeO2 or Y2O3 (>4 wt.%) results in the increase of carbides quantity and the aggregation of carbides, which reduces the impact energy and tensile strength of the samples. Present study indicates that the optimum addition of CeO2 and Y2O3 for the P20 die steels is 4 wt.%.

A novel recycled polyethylene terephthalate/polyamide 11 (rPET/PA11) thermoplastic blend

2021 ◽  
pp. 147776062110010
Author(s):  
Zahid Iqbal Khan ◽  
Zurina Binti Mohamad ◽  
Abdul Razak Bin Rahmat ◽  
Unsia Habib ◽  
Nur Amira Sahirah Binti Abdullah
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Flexural Strength ◽  
Polyethylene Terephthalate ◽  
Practical Implication ◽  
Polyamide 11 ◽  
Recycled Polyethylene ◽  
Twin Screw ◽  
Electron Microscopy Analysis ◽  
The Impact

This work explores a novel blend of recycled polyethylene terephthalate/polyamide 11 (rPET/PA11). The blend of rPET/PA11 was introduced to enhance the mechanical properties of rPET at various ratios. The work’s main advantage was to utilize rPET in thermoplastic form for various applications. Three different ratios, i.e. 10, 20 and 30 wt.% of PA11 blend samples, were prepared using a twin-screw extruder and injection moulding machine. The mechanical properties were examined in terms of tensile, flexural and impact strength. The tensile strength of rPET was improved more than 50%, while the increase in tensile strain was observed 42.5% with the addition of 20 wt.% of PA11. The improved properties of the blend were also confirmed by the flexural strength of the blends. The flexural strength was increased from 27.9 MPa to 48 MPa with the addition of 30 wt.% PA11. The flexural strain of rPET was found to be 1.1%. However, with the addition of 10, 20 and 30 wt.% of PA11, the flexural strain was noticed as 1.7, 2.1, and 3.9% respectively. The impact strength of rPET/PA11 at 20 wt.% PA11 was upsurged from 110.53 to 147.12 J/m. Scanning electron microscopy analysis revealed a dispersed PA11 domain in a continuous rPET matrix morphology of the blends. This work practical implication would lead to utilization of rPET in automobile, packaging, and various industries.

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