A tensile testing machine for a scanning electron microscope; Its structure, properties and applications

The effect of Er on microstructure and mechanical properties of the 5052 aluminum alloy with a big width-to-thickness ratio was investigated by a metallurgical microscope, scanning electron microscope and tensile testing machine. The results showed that the precipitates were slightly refined after Er addition and Al3Fe was transformed into Al6Fe and AlEr with/without a small amount of Fe or Si. The effect of Er on grain refinement was related to its content. When Er content was lower or higher than 0.4%, the grain would coarsen. Homogenization could refine the grain by controlling Er content and distribution in the Al matrix. Long time homogenization at high temperature would significantly reduce the strength of the 5052 aluminum alloy and 5052 aluminum alloys with low Er content, but help to improve the plasticity of those with high Er content. The ultimate tensile strength, yield strength and elongation of the as-cast 5052 aluminum alloy were 197 MPa, 117 MPa and 22.5% respectively. The strength was the highest, when Er content was 0.4 wt. % and the elongation was the best at 0.1 wt. % Er content.

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In-situ tensile testing of single-crystal molybdenum-alloy fibers with various dislocation densities in a scanning electron microscope

Journal of Materials Research ◽

10.1557/jmr.2011.298 ◽

2011 ◽

Vol 27 (3) ◽

pp. 508-520 ◽

Cited By ~ 26

Author(s):

Kurt E. Johanns ◽

Andreas Sedlmayr ◽

P. Sudharshan Phani ◽

Reiner Mönig ◽

Oliver Kraft ◽

...

Keyword(s):

Electron Microscope ◽

Scanning Electron Microscope ◽

Single Crystal ◽

Tensile Testing ◽

Molybdenum Alloy ◽

Dislocation Densities ◽

Image Position ◽

Scanning Electron ◽

In Situ Tensile Testing

Abstract

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Influence of Mole Ratio and Pressure on Properties of UHMWPA6/GdCl3 Fiber by Dry-Spinning Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.627.312 ◽

2012 ◽

Vol 627 ◽

pp. 312-316

Author(s):

Hui Min Zhang ◽

Pei Pei Song ◽

Qing Xiu Jia

Keyword(s):

Mechanical Properties ◽

Fourier Transform ◽

Electron Microscope ◽

Hydrochloric Acid ◽

Scanning Electron Microscope ◽

Tensile Testing ◽

Complexing Agent ◽

Dry Spinning ◽

Morphology And Mechanical Properties ◽

Scanning Electron

In this work, the solution of PA6/GdCl3 with different complex ratios were prepared, using gadolinium trichloride (GdCl3) as complexing agent, formic acid and hydrochloric acid as solvent. The fibers were then prepared by dry spinning method and characterized with scanning electron microscope (SEM), Fourier transform infrared (FTIR) spectroscopy and Instron tensile testing. The results indicated that fibers with good morphology and mechanical properties could be obtained when mole ratio (MR) was 0.04 and PA6 concentration was 22wt%. Moreover, we found that spinning pressure had significant influence on the properties of fibers.

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Effect of B Refinement on Structure and Fracture Morphology of Al-7 wt.% Si Alloy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.590.181 ◽

2014 ◽

Vol 590 ◽

pp. 181-186

Author(s):

Xiao Song Li ◽

An Hui Cai ◽

Ji Jie Zeng

Keyword(s):

Electron Microscopy ◽

Mechanical Properties ◽

Scanning Electron Microscopy ◽

Tensile Testing ◽

Testing Machine ◽

Fracture Morphology ◽

Optical Microscope ◽

Tensile Testing Machine ◽

Alloy Microstructure ◽

Scanning Electron

Using optical microscope, electronic tensile testing machine, scanning electron microscopy methods, such as detailed treatment of the B hypoeutectic Al-Si alloy microstructure, mechanical properties and fracture morphology were studied. The results showed that after treatment by the B refinement, α-Al dendrite phase was refined, resulting in mechanical properties of Al-Si alloy significantly improved. Which, B content 0.036wt.%, the alloy the best, the σb, δ, respectively, than the non-thinning increased 67.8% and 15.2%. From the fracture surface, the fracture morphology of the specimen showed a quasi-cleavage fracture. Which, B content 0.036wt.% at the time of fracture is more deep dimples, and a good plastic toughness.

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PENGARUH SIFAT PERMUKAAN TERHADAP STRUKTUR MIKRO DAN KEKUATAN MEKANIK SAMBUNGAN BAJA KARBON DAN TEMBAGA

MULTITEK INDONESIA ◽

10.24269/mtkind.v13i1.1330 ◽

2019 ◽

Vol 13 (1) ◽

pp. 1

Author(s):

Nanang Sufiadi Ahmad ◽

Yoyok Winardi

Keyword(s):

Electron Microscope ◽

Scanning Electron Microscope ◽

Testing Machine ◽

Universal Testing Machine ◽

Universal Testing ◽

Scanning Electron

Baja dan tembaga secara luas dipakai untuk berbagai macam kontruksi, karena kedua material itu memiliki sifat yang saling melengkapi. Penelitian ini ditujukan untuk menyelidiki pengaruh sifat permukaan logam dasar terhadap struktur mikro dan kekuatan mekanik sambungan antara baja karbon dan tembaga. Penyambungan dilakukan dengan proses brazing. Sifat permukaan kedua logam didapat dengan cara digosok menggunakan kertas amplas dari grid 100,500,1000,1500, dan 2000. Struktur mikro daerah sambungan brazing diamati menggunakan scanning electron microscope (SEM) setelah melalui tahap poles dan etsa. Kekuatan mekanik sambungan diuji menggunakan universal testing machine (UTM). Dari hasil pengamatan struktur mikro didapatkan hasil bahwa logam pengisi mampu mengalir memenuhi celah sambungan pada setiap variasi kekasaran permukaan. Berdasarkan uji tarik, kekuatan tarik meningkat ketika permukaan semakin halus. Kekuatan tarik maksimum mencapai 7741,8854 N/mm2 ketika permukaan logam dasar diamplas dengan grid 2000.

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Changes in Enamel Topography with the Contemperary Orthodontic Adhesives: A Pilot Study

Open Access Journal of Dental Sciences ◽

10.23880/oajds-16000293 ◽

2021 ◽

Vol 6 (2) ◽

Author(s):

Ashish Kamboj

Keyword(s):

Electron Microscope ◽

Scanning Electron Microscope ◽

Bond Strength ◽

Shear Bond Strength ◽

Testing Machine ◽

Single Step ◽

Acid Etching ◽

Surface Profilometry ◽

Scanning Electron

Introduction: The self-etching primer system consists of etchant and primer dispersed in a single unit. The etching and priming are merged as a single step leading to fewer stages in bonding procedure and reduction in the number of steps that also reduces the chance of introduction of error, resulting in saving time for the clinician. It also results in smaller extent of enamel decalcification. Aim: To compare the Shear Bond Strength (SBS) of orthodontic molar tubes bonded with conventional acid etching system and Self-Etch Primers (SEP) and to study the surface appearance of enamel after debonding using surface profilometry and scanning electron microscope. Materials and Methods: The sample of this in-vitro study consisted of sixty caries free, intact extracted mandibular first molar teeth. A molar tube of 0.018” Roth prescription with micro etched base was bonded to each molar with two different bonding agents. All the molar tubes were subsequently tested for evaluation of shear bond strength with a universal testing machine. Surface Profilometry and Scanning Electron Microscope (SEM) was used to evaluate the effect of various light cure adhesives on the enamel morphology. Results: Transbond-XT exhibited the highest bond strength (22.6 MPa) closely followed by Transbond Plus SEP (19.6 MPa). However, Transbond-XT sample also had higher surface roughness and enamel alterations as compared to the Transbond Plus SEP. Conclusion: The adequate bond strength of self-etching primers, less deleterious effects on the enamel and less chair side time due to absence of acid etching makes it a good option for routine use in orthodontics.

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Study on Strengthening and Toughening Mechanisms of Aluminum Alloy 2618-Ti at Elevated Temperature

High Temperature Materials and Processes ◽

10.1515/htmp-2015-0226 ◽

2018 ◽

Vol 37 (1) ◽

pp. 9-15 ◽

Cited By ~ 3

Author(s):

Ma Kun ◽

Liu Tingting ◽

Liu Ya ◽

Su Xuping ◽

Wang Jianhua

Keyword(s):

Elevated Temperature ◽

Tensile Testing ◽

Load Transfer ◽

Testing Machine ◽

Strengthening Effect ◽

Toughening Mechanisms ◽

Tensile Testing Machine ◽

Temperature Range ◽

Fine Grain ◽

Scanning Electron

AbstractThe tensile properties of the alloy 2618 and 2618-Ti were tested using a tensile testing machine. The morphologies of the fracture of tensile samples were observed using scanning electron microscopy. The strengthening and toughening mechanisms of alloy 2618-Ti at elevated temperature were systematically investigated based on the analyses of experimental results. The results showed that the tensile strength of alloy 2618-Ti is much higher than that of alloy 2618 at the temperature range of 250 and 300 °C. But the elongation of alloy 2618-Ti is much higher than that of alloy 2618 at the temperature range of 200 and 300 °C. The equal-strength temperature of intragranular and grain boundary of alloy 2618-Ti is about 235 °C. When the temperature is lower than 235 °C, the strengthening of alloy 2618-Ti is ascribed to the strengthening effect of fine grains and dispersed Al3Ti/Al18Mg3Ti2 phase. When the temperature is higher than 235 °C, the strengthening effect of alloy 2618-Ti is mainly attributed to the load transfer of Al3Ti and Al18Mg3Ti2 particles. The toughening of alloy 2618-Ti at elevated temperature is mainly ascribed to the fine grain microstructure, excellent combination between matrix and dispersed Al3Ti/Al18Mg3Ti2 particles as well as the recrystallization of the alloy at elevated temperature.

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Factors Affecting on the Bond Strength of Dental Zirconia to Veneering Porcelains

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.529-530.507 ◽

2012 ◽

Vol 529-530 ◽

pp. 507-511 ◽

Cited By ~ 2

Author(s):

Jiro Tsuruki ◽

Hiroshi Kono ◽

Yuji Okuda ◽

Makoto Noda ◽

Hiroyuki Arikawa ◽

...

Keyword(s):

Electron Microscope ◽

Scanning Electron Microscope ◽

Cross Sections ◽

Testing Machine ◽

Acrylic Resin ◽

Factors Affecting ◽

Specimen Holder ◽

Universal Testing ◽

Bond Strengths ◽

Scanning Electron

The bond strengths between two kinds of zirconia and three kinds of feldspathic veneering porcelains were measured. The specimens were prepared at four firing temperatures for three holding periods, respective opaque porcelain was painted and vacuum-fired. Then, each dentin porcelain was condensed in an acrylic resin mold and vacuum-fired under the conditions mentioned above. Cross sections of the interface between zirconia and porcelain were observed with a scanning electron microscope. The specimens were fixed to specimen holder on a universal testing machine. Data of the bonding test were statistically analyzed. The results showed that all the four factors statistically affected the bonding strength (p<0.01). The contribution of the firing temperature was highest and that of the porcelain type was lowest (p<0.01).

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