Tensile Fracture Characteristics of Polysulfide Sealants Immersed in Oil

2011 ◽  
Vol 689 ◽  
pp. 455-460 ◽  
Author(s):  
Mei Li Ding ◽  
Wei Fang Zhang ◽  
Wei Guo Hou ◽  
Xiao Liu
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tensile Test ◽  
Immersion Time ◽  
Fracture Behavior ◽  
Tensile Fracture ◽  
Fracture Characteristics ◽  
Oil Immersion ◽  
Rough Region ◽  
Scanning Electron

In this paper, the morphology characteristic of tensile test fracture of polysulfide sealants immersed in oil for different time was observed through scanning electron microscopy. Combined with the performance data of tensile test, the effect of oil immersion time on the properties and fracture behavior of sealant was studied. The results show that the fracture of polysulfide sealants includes rough region and flat region. After being immersed in oil, the area of rough region diminishes and the roughness of fracture decreases. Within 168h, oil immersion time has little effect on the tensile strength and elongation of sealants.

scholarly journals Microstructural Analysis of Fractured Orthopedic Implants

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2209
Author(s):  
Mateusz Kopec ◽  
Adam Brodecki ◽  
Grzegorz Szczęsny ◽  
Zbigniew L. Kowalewski
Keyword(s):  
Physical Activity ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fracture Behavior ◽  
Locking Plate ◽  
Microstructural Analysis ◽  
Pure Titanium ◽  
Orthopedic Implants ◽  
Mechanical Loads ◽  
Scanning Electron

In this paper, fracture behavior of four types of implants with different geometries (pure titanium locking plate, pure titanium femoral implant, Ti-6Al-4V titanium alloy pelvic implant, X2CrNiMo18 14-3 steel femoral implant) was studied in detail. Each implant fractured in the human body. The scanning electron microscopy (SEM) was used to determine the potential cause of implants fracture. It was found that the implants fracture mainly occurred in consequence of mechanical overloads resulting from repetitive, prohibited excessive limb loads or singular, un-intendent, secondary injures. Among many possible loading types, the implants were subjected to an excessive fatigue loads with additional interactions caused by screws that were mounted in their threaded holes. The results of this work enable to conclude that the design of orthopedic implants is not fully sufficient to transduce mechanical loads acting over them due to an increasing weight of treated patients and much higher their physical activity.

Scanning Electron Microscopy Studies of Nitrile Rubber Fractured Surfaces

1980 ◽  
Vol 53 (2) ◽  
pp. 321-326 ◽  
Author(s):  
A. K. Bhowmick ◽  
S. Basu ◽  
S. K. De
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fracture Surface ◽  
Polymer Fibers ◽  
Tensile Fracture ◽  
Flow Lines ◽  
Tensile Fracture Surface ◽  
Test Conditions ◽  
Heat Buildup ◽  
Scanning Electron

Abstract The fracture surfaces of a NBR vulcanizate after different test conditions have been studied by scanning electron microscopy. It has been shown that failure surfaces manifest typical characteristics dependent on the nature of the test. Tensile fracture surface shows occurrence of two different tear rates in the case of a filled NBR vulcanizate, while tear fracture is characterized by a few long flow lines. De Mattia flexing leads to layering of polymer fibers. Heat buildup and abrasion tests generate a ribbed structure on the surface.

Effect of Nanocellulose Loading on Tensile Properties of Nitrile Rubber

2017 ◽  
Vol 264 ◽  
pp. 112-115
Author(s):  
Erfan Suryani Abdul Rashid ◽  
Wageeh Abdulhadi Yehye ◽  
Nurhidayatullaili Muhd Julkapli ◽  
Sharifah Bee O.A. Abdul Hamid
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Tensile Test ◽  
Tensile Properties ◽  
Mechanical Performance ◽  
Butadiene Rubber ◽  
Fracture Surfaces ◽  
Scanning Electron

Nanocellulose (NCC) is incorporated into nitrile butadiene rubber (NBR) latex with the composition 0 to 5 phr using dipping method. Mechanical properties of NBR/NCC composites using tensile test was used to characterize their mechanical performance and the fracture surfaces post tensile test were studied. The tensile strength of NBR/NCC composites increase significantly with the addition of nanocellulose. This could be anticipated due to the presence of Van der Waals interaction between hydrophilic natures of nanocellulose with hydrophobic of NBR consequently limits the tearing propagation. The result was supported with the fracture surfaces morphology viewed under Fourier Emission Scanning Electron Microscopy (FESEM).

Investigation of the weldability of AISI304 and AISI1030 steels welded by friction welding

2020 ◽  
Vol 117 (6) ◽  
pp. 601
Author(s):  
Tanju Teker ◽  
Eyyüp Murat Karakurt ◽  
Murat Özabaci ◽  
Yaşar Güleryüz
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Friction Welding ◽  
Rotational Speed ◽  
Fracture Behavior ◽  
Energy Dispersive Spectrometry ◽  
Weld Strength ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

In this study, the effect of rotational speed on the microstructure and weldability of AISI1030 steel and AISI304 stainless steel welded by friction welding method were investigated experimentally. The weld joints were manufactured with rotational speed (1500, 1600, 1700, 1800, 1900, and 2000 rev/min.), friction pressure (40 MPa), forging pressure (60 MPa), forging time (4 s), and friction time (6 s). After the FW process, the microstructures of the weld interfaces were analyzed by optic microscopy, scanning electron microscopy, energy dispersive spectrometry, elemental mapping, and X-ray diffraction analysis. Moreover, the weld strength was analyzed by tensile test, and the fracture behavior was investigated with scanning electron microscopy. The results indicated that increased rotational speed had a significant effect on the microstructure and weldability.

Clastic Rock Reservoir Physical Characteristics of Southern Songliao Basin Changling Fault Depression Layer

2013 ◽  
Vol 838-841 ◽  
pp. 1320-1323
Author(s):  
Yun Feng Zhang ◽  
Tian Tian Chu ◽  
Hong Qi Yuan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Thin Section ◽  
Secondary Porosity ◽  
Fracture Characteristics ◽  
Clastic Rock ◽  
Mercury Intrusion ◽  
Thin Section Analysis ◽  
Section Analysis ◽  
Scanning Electron

We study the Changling fault depression layer reservoir space type and characteristic of clastic rock reservoirs in the study area, by core observation, thin section analysis, cathodoluminescence analysis, scanning electron microscopy and mercury intrusion method, and discusses the development of secondary porosity and fracture characteristics and formation mechanism.

scholarly journals Removal and Fracture Characteristics of Cemented Tungsten Carbide under Nanoindenting and Nanoscratching

2010 ◽  
Vol 447-448 ◽  
pp. 16-20 ◽  
Author(s):  
Rudy Irwan ◽  
Han Huang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tungsten Carbide ◽  
Acoustic Emissions ◽  
Fracture Characteristics ◽  
Force Microscopy ◽  
Atomic Force ◽  
Scanning Electron ◽  
Cemented Tungsten Carbide

Nanoindenting and nanoscratching were used to investigate removal and fracture characteristics of cemented tungsten carbide (cWC). Nanoindentation results indicated that the elastic modulus and hardness of WC grains were significantly greater than those measured in cobalt binder rich regions, respectively. Few evidences of cracking or fracture were observed on the indented surfaces using both in-situ atomic force microscopy and scanning electron microscopy. However, the pop-in events were observed from indenting load-displacement curves and the corresponding acoustic emissions were detected, indicating the occurrences of brittle fracture. Nanoscratch results demonstrated that similar removal characteristics existed, but cracking was observed in both surface and subsurface of the scratched samples.

Influence of Molybdenum and Boron Addition on Fracture of P/M Parts

2016 ◽  
Vol 682 ◽  
pp. 265-269
Author(s):  
Małgorzata Perek-Nowak ◽  
Joanna Karwan-Baczewska
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tensile Test ◽  
Hydrogen Atmosphere ◽  
Transgranular Fracture ◽  
Boron Addition ◽  
Low Concentrations ◽  
Boron Particles ◽  
Type Of Fracture ◽  
Scanning Electron

Samples made of iron powder with addition of 1.5 and 2% of molybdenum and 0-0.6% of boron were compacted at 600 MPa and sintered at 1200°C for 60 minutes in hydrogen atmosphere after mixing in Turbula mixer. The samples were deformed in a tensile test till rupture. The effect of molybdenum and boron on topography of fracture is discussed. It is noted that the sintering mechanism changes upon addition of boron particles into Fe-Mo alloy. The fractures of the studied samples were observed by means of scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The addition of Mo influences the change of fracture to ductile type. The type of fracture is brittle with Mo and borides segregating to grain boundaries. In the alloys with low concentrations of molybdenum boron induces brittle transgranular fracture.

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