Effects of Bio-Fuels on Common Static Sealing Elastomers

2009 ◽  
Vol 82 (3) ◽  
pp. 369-378 ◽  
Author(s):  
F. J. Walker
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Temperature ◽  
Volume Change ◽  
Low Sulfur

Abstract The purpose of this investigation was to explore the effects of bio-fuels on several common static sealing elastomers. This study explored ethanol-enriched gasoline and soy-based diesel. Exposed to these fuels were fifteen common static sealing elastomer compounds. These were comprised of eight FKM compounds, and two NBR compounds. In addition, other compositions were also included in the study. These comprised VMQ, FVMQ, AEM di-polymer, HNBR and a high temperature ACM. The percentage of ethanol enrichment was varied from zero to 100 percent. The bio-diesel section of this study examined comparative effects of conventional low-sulfur diesel, twenty percent soy diesel, and 100 percent soy diesel. Effects on conventional mechanical properties of hardness, tensile strength, elongation and volume change were measured.

scholarly journals The Influence of La and Ce on Microstructure and Mechanical Properties of an Al-Si-Cu-Mg-Fe Alloy at High Temperature

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 384
Author(s):  
Andong Du ◽  
Anders E. W. Jarfors ◽  
Jinchuan Zheng ◽  
Kaikun Wang ◽  
Gegang Yu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Temperature ◽  
Intermetallic Phases ◽  
High Temperature Strength ◽  
Thermal Expansion Mismatch ◽  
Strengthening Mechanisms ◽  
High Temperature Mechanical Properties ◽  
Minor Contribution ◽  
A Minor

The effect of lanthanum (La)+cerium (Ce) addition on the high-temperature strength of an aluminum (Al)–silicon (Si)–copper (Cu)–magnesium (Mg)–iron (Fe)–manganese (Mn) alloy was investigated. A great number of plate-like intermetallics, Al11(Ce, La)3- and blocky α-Al15(Fe, Mn)3Si2-precipitates, were observed. The results showed that the high-temperature mechanical properties depended strongly on the amount and morphology of the intermetallic phases formed. The precipitated tiny Al11(Ce, La)3 and α-Al15(Fe, Mn)3Si2 both contributed to the high-temperature mechanical properties, especially at 300 °C and 400 °C. The formation of coarse plate-like Al11(Ce, La)3, at the highest (Ce-La) additions, reduced the mechanical properties at (≤300) ℃ and improved the properties at 400 ℃. Analysis of the strengthening mechanisms revealed that the load-bearing mechanism was the main contributing mechanism with no contribution from thermal-expansion mismatch effects. Strain hardening had a minor contribution to the tensile strength at high-temperature.

Microstructure and Mechanical Properties of Mg-Based Composites Reinforced with TiB2 Particles

2014 ◽  
Vol 900 ◽  
pp. 141-145 ◽  
Author(s):  
Can Feng Fang ◽  
Guang Xu Liu ◽  
Ling Gang Meng ◽  
Xing Guo Zhang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Composite Material ◽  
High Temperature ◽  
The Self ◽  
Al Alloy ◽  
Temperature Synthesis ◽  
Microstructure And Mechanical Properties ◽  
High Temperature Synthesis

The effects of in-situ TiB2 particle fabricated from Al-Ti-B system via the self-propagating high-temperature synthesis (SHS) reaction technology on microstructure and mechanical properties of Mg-Sn-Zn-Al alloy were investigated. The results indicate that the size of the Mg2Sn and α-Mg+Mg32(Al,Zn)49 phase becomes coarser with the increasing content of Al-Ti-B preform, meanwhile the amount of eutectic α-Mg+Mg32(Al,Zn)49 phase increases too. The addition of Al-Ti-B is favorable toward promoting the strength of composites, but deteriorates elongation. The resulting as-extruded composite material with 4 wt.% Al-Ti-B preform exhibits good overall mechanical properties with an ultimate tensile strength of 291 MPa and an elongation over 2 %.

Experimental Research on Mechanical Properties of Polypropylene Flexible Intermediate Bulk Container Base Materials

2013 ◽  
Vol 811 ◽  
pp. 146-151
Author(s):  
Chen Wei Chen ◽  
Fu Xin Yang ◽  
Li Xin Lu ◽  
Jin Xie ◽  
Li Li
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Temperature ◽  
Low Temperature ◽  
Base Material ◽  
Powder Materials ◽  
Base Materials ◽  
Natural Exposure ◽  
Exposure Experiment ◽  
Tensile Experiment

The Flexible Intermediate Bulk Container (FIBC) is a flexible transportation packaging container that is weaved by polyolefin plastic ribbon-like filament, which is widely used in the storage and transportation of granular and powder materials. When the FIBC was affected by environment factors synthetically under using, such as light, heat and air etc, it would come into degradation and its mechanical properties reduced. In this study, the basic mechanical properties of polypropylene FIBC base material were tested by tensile experiment and the reason of main base material mechanical properties difference between theoretical value and experimental value was analyzed. Based on the FIBC different using environments, the natural exposure experiment and high/low temperature experiments were carried out, we took tensile strength holding ratio and elongation holding ratio as evaluating indicator and analyzed law of influence of the different experiment condition on base material mechanical properties, which provided valuable reference for FIBC designing and manufacturing. Along with the experiment time increased, the color of base material changed from milk white to yellow slowly, the tensile strength and elongation reduced, the influencing grade was as follow: natural exposure>high temperature>low temperature. The results of natural exposure experiment showed that there was difference of anti-aging performance among the FIBC base material, the mechanical properties of woof fabric and belt reduced evidently, while others reduced slowly. For high (45°C)/low (-25°C) temperature experiments, the reduction of FIBC base materials mechanical properties were not obvious and woof fabric reduced a little faster comparatively.

Study on Thermal Resistance of Basalt Filament Yarn

2010 ◽  
Vol 146-147 ◽  
pp. 666-669 ◽  
Author(s):  
Xin E Li
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Temperature ◽  
Thermal Resistance ◽  
High Performance ◽  
Filament Yarn ◽  
High Tensile Strength ◽  
New Type ◽  
High Temperature Gas ◽  
Basalt Rock

Basalt filament yarn is a new type of high-performance fibers, which is formed by the direct drawing of basalt rock at high temperatures. It is a natural and environmentally friendly textile material. This paper mainly focuses on thermal resistance research of basalt filament yarn that is heated at various temperatures. The change of color and appearance of heated basalt filament yarn was described. The mechanical properties of heated basalt filament yarn were tested. The results showed that although the mechanical properties of basalt filament yarn decreased with the temperature rising, still remained high tensile strength within a certain temperature range. Basalt filament yarn possess higher tenacity under 325°C. Basalt filament yarns still possess certain tenacity when they were placed at 500°C condition. So basalt filament yarn can be used as heat-resistant materials, such as filtration materials for high-temperature gas and liquid, fire-proof fabrics and so on.

scholarly journals Laser Oscillating Welding of TC31 High-Temperature Titanium Alloy

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1185
Author(s):  
Zhimin Wang ◽  
Lulu Sun ◽  
Wenchao Ke ◽  
Zhi Zeng ◽  
Wei Yao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Titanium Alloy ◽  
High Temperature ◽  
Laser Welding ◽  
Room Temperature ◽  
Base Material ◽  
Aerospace Applications ◽  
Weld Appearance ◽  
Laser Welds

The joining of high-temperature titanium alloy is attracting much attention in aerospace applications. However, the defects are easily formed during laser welding of titanium alloys, which weakens the joint mechanical properties. In this work, laser oscillating welding was applied to join TC31 high-temperature titanium alloy. The weld appearance, microstructure and mechanical properties of the laser welds were investigated. The results show that sound joints were formed by using laser oscillating welding method, and a large amount of martensite was presented in the welds. High mechanical properties were achieved, which was approaching to (or even equaled) the strength of the base material. The joints exhibited a tensile strength of up to 1200 ± 10 MPa at room temperature and 638 ± 6 MPa at 923 K. Laser oscillating welding is beneficial to the repression of porosity for welding high-temperature titanium alloy.

Effect of the Content of Cu on Solderability and Mechanical Properties of Bi5Sb Solder Alloy

2009 ◽  
Vol 610-613 ◽  
pp. 537-541 ◽  
Author(s):  
Yan Fu Yan ◽  
Li Fang Feng ◽  
Xiao Xiao Guo ◽  
Kun Tang ◽  
Ke Xing Song
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Temperature ◽  
Melting Point ◽  
Solder Alloy ◽  
Ternary Alloy ◽  
Spreading Area ◽  
The Matrix ◽  
Difficult Subject ◽  
High Temperature Solder

It is a difficult subject to develop the high temperature solder with thewhose melting point is within 250～450°C in solder field. Bi5Sb solder alloy whosewith the melting point of about is about 280°C is limited for itshas bad solderability and mechanical properties. In the present work, the new BiSbCu ternary alloy wasis preparformed by adding different contents of Cu to Bi5Sb solder alloy to improve its solderability and mechanical properties. Results showed that the effect of adding 0.5～5.0％Cu into Bi-5Sb on the melting point of Bi5Sb solder alloy wais not distinct , but its solderability and mechanical properties weare markedly improved. Compared to the matrix of Bi5Sb, the spreading area of solder alloy wais about 57.8% largbigger and the tensile strength wais about 212.4% highbigger when the content of Cu wais 1.5wt.%. Analysis of tThe microstructure showeds that the needle-like Cu2Sb gradually becaomes shorter and dense along with the increasing of the content of Cu, which can effectaffected the properties of the solder alloy.

Thermo-Mechanical Properties of Geopolymer/Carbon Fiber/TiO2 Nanoparticles (NPs) Composite

2019 ◽  
Vol 967 ◽  
pp. 267-273
Author(s):  
Subaer ◽  
Abdul Haris ◽  
Noor Afifah Kharisma ◽  
Nur Akifah ◽  
Risna Zulwiyati
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Thermal Properties ◽  
High Temperature ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Experimental Results ◽  
Temperature Resistance ◽  
Cleaning Agent ◽  
High Temperature Resistance

The main objective of this study is to investigate the thermo-mechanical properties of composite made from geopolymer/carbon fiber/TiO2 NPs. The composite was fabricated from geopolymer based on metakaolin added with carbon fibers as reinforcement and TiO2 NPs as self-cleaning agent. The thermal properties of the composite was examined by subjecting the samples to temperature up to 750OC for 4 hours. The mechanical properties of the resulting materials were measured by using flexural and tensile strength measurements. The experimental results showed that the compsite exhibited high temperature resistance and the addition of carbon fiber were increase the flexural as well as the tensile strength of the composite.

scholarly journals Effect of Heat treatment on Microstructure and Mechanical Properties of Ti-6Al-2Zr-1Mo-1V Bar

2020 ◽  
Vol 321 ◽  
pp. 11046
Author(s):  
Xu Enen ◽  
Tian Yanwen ◽  
Hao Fang ◽  
Cu Linin ◽  
Du Yuxuan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
High Temperature ◽  
Microstructure Evolution ◽  
Second Stage ◽  
Β Phase ◽  
Α Phase ◽  
Duration Time ◽  
Stage Heat Treatment

In this paper, the microstructure evolution and mechanical properties fluctuation of Ti-6Al-2Zr-1Mo-1V forging state bar after the first stage heat treatment at 950℃~955℃ and the second stage heat treatment at 760℃~840℃ were studied. In the first stage of heat treatment, the content of primary α and the tensile strength decreases with the increase of temperature, and the high temperature duration time is obviously prolonged. During the second stage of heat treatment, the metastable β phase precipitates third α phase, and with the increase of temperature, the tensile strength increases and the high temperature duration time prolongs.

Microstructure and Mechanical Properties of 45 Steel by Zero Time Holding Quenching

2011 ◽  
Vol 335-336 ◽  
pp. 577-582
Author(s):  
Xiao Wen Chen ◽  
De Fen Zhang ◽  
Guang Wen Long ◽  
Qin Zou ◽  
Li Wang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Temperature ◽  
Yield Strength ◽  
Quenching Temperature ◽  
Universal Testing ◽  
Quenching Condition ◽  
Steel Increase ◽  
Different Temperatures ◽  
Zero Time

45 steel was quenched with zero time holding at different temperatures, followed by a high temperature tempering. The influence of quenching temperature on hardness, yield strength, tensile strength and microstructure of the steels was investigated by Rockwell tester, universal testing machines and metallographic microscopy, respectively. The results show that under quenching condition of zero time holding, hardness and strength of the 45 steel increase with increasing quenching temperature and reach the maximum at 860 °C, where the content of martensite is maximum while that of ferrite is minimum in the specimen. At higher temperatures, the grains become obviously coarse, resulting in decrease of mechanical properties.

Properties of Bamboo Fiber Reinforced Cornstarch-Based Composites

2012 ◽  
Vol 200 ◽  
pp. 237-242
Author(s):  
Guang Sheng Zeng ◽  
Rui Zhen Lin ◽  
Cong Meng ◽  
Lei Chen
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Temperature ◽  
Extrusion Process ◽  
Elongation Rate ◽  
Bamboo Fiber ◽  
Physical Methods ◽  
Plasticizer Content ◽  
Different Content ◽  
Properties Of Composites

In this paper the composites made of cornstarch and PVA as matrix, bamboo fiber as reinforcement, glycerol and urea as mixed plasticizer were prepared through the extrusion molding. By physical methods, the effects of cornstarch, bamboo fiber, PVA and mixed plasticizer on the mechanical properties of composites were investigated. SEM was used to observe the influence of different content of mixed plasticizer in cornstarch. The results showed that an increase in mixed plasticizer content from 10% to 40% in cornstarch did improve the mechanical properties of the composites compared without mixed plasticizer, and when the mixed plasticizer (wt-glycerol: wt-urea=2:1) content was 30% to cornstarch, the composite showed the highest tensile strength and elongation rate. Composites made from 20% of bamboo fiber, 30% of cornstarch, 50% of PVA and 30% of mixed plasticizer to cornstarch gave the best tensile strength (15.8N). Glycerol and urea could permeate the cornstarch molecules and plasticize it under high temperature and shearing in the extrusion process.

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