Research on Pinholes in Aluminum Foil

2014 ◽  
Vol 884-885 ◽  
pp. 308-311
Author(s):  
Qing Wei Dai ◽  
Ding Fei Zhang ◽  
Xi Chen ◽  
Jing Ren Dong ◽  
Fu Sheng Pan
Keyword(s):  
Heat Treatment ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Optical Microscopy ◽  
Energy Dispersive Spectrometer ◽  
Aluminum Foil ◽  
Energy Dispersive ◽  
Treatment Processes ◽  
Scanning Electron

To investigate pinholes in 8079 Aluminum foil, optical microscopy and scanning electron microscope with energy dispersive spectrometer were adopted. Results show that four types of pinholes in 8079 aluminum foil, (1) small size, rod-shaped, (2) pinhole in groove, (3) hole with big size, (4) crumpled pinholes. Big compounds along with all rolling and heat treatment processes cause the small rod-shaped pinhole. The big compound contains elements of Al-Fe-O.

scholarly journals Calorimetric study on Bi-Cu-Sn alloys

2019 ◽  
Vol 38 (2019) ◽  
pp. 541-546
Author(s):  
Jolanta Romanowska
Keyword(s):  
Differential Scanning Calorimetry ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Temperature Interval ◽  
Energy Dispersive Spectrometer ◽  
Energy Dispersive ◽  
Calorimetric Study ◽  
Calorimetric Investigation ◽  
Scanning Calorimetry ◽  
Scanning Electron

AbstractThe paper presents results of calorimetric investigation of the Bi-Cu-Sn system by means of differential scanning calorimetry (DSC) at the temperature interval 25-1250∘C, Values of liquidus, solidus and invariant reactions temperatures, as well as melting enthalpies of the selected alloys were determined. Microstructure investigation of the alloys were performed by the use of a scanning electron microscope (SEM) equipped with an energy-dispersive spectrometer (EDS).

scholarly journals Effect of Cerium on the Microstructure and Inclusion Evolution of C-Mn Cryogenic Vessel Steels

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5262
Author(s):  
Liping Wu ◽  
Jianguo Zhi ◽  
Jiangshan Zhang ◽  
Bo Zhao ◽  
Qing Liu
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Heterogeneous Nucleation ◽  
Energy Dispersive Spectrometer ◽  
Energy Dispersive ◽  
Vessel Steel ◽  
Cryogenic Vessel ◽  
Central Segregation ◽  
Scanning Electron

The effects of Cerium (Ce) were studied on the casting slab quality, microstructure, and inclusion evolution of cryogenic vessel steel. An optical metallographic microscope, scanning electron microscope, energy dispersive spectrometer, and Thermo-calc thermodynamic software were used for characterization and analysis. The results indicated that the central segregation was significantly improved after adding Ce and reached the lowest level when the content of Ce was 0.0009 wt.%. Meanwhile, the presence of Ce reduces the size of ferrite and improves pearlite morphology. Ce also enables the modification of Al2O3 and MnS + Ti4C2S2 inclusions into ellipsoid CeAlO3 and spherical Ce2O2S + Ti4C2S2 composite inclusions, respectively, which are easier to remove. The formed Ce2O2S inclusions are fine and can work as heterogeneous nucleation points to refine the microstructure of steel.

scholarly journals PENGAMATAN STRUKTUR MIKRO PADA KOROSI ANTAR BUTIR DARI MATERIAL BAJA TAHAN KARAT AUSTENITIK SETELAH MENGALAMI PROSES PEMANASAN

2009 ◽  
Vol 3 (2) ◽  
pp. 107
Author(s):  
Anwar Budianto ◽  
Kristina Purwantini ◽  
BA Tjipto Sujitno
Keyword(s):  
Heat Treatment ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Holding Time ◽  
Energy Dispersive ◽  
X Ray ◽  
Ss 304 ◽  
Scanning Electron

PENGAMATAN STRUKTUR MIKRO PADA KOROSI ANTAR BUTIR DARI MATERIAL               BAJA      TAHAN KARAT                             AUSTENITIK             SETELAH MENGALAMI PROSES HEAT PEMANASAN. Telah dilakukan pengamatan korosi  antar  butir pada  material  baja tahan karat  austenitik  jenis  SS 304 setelah mengalami proses perlakuan panas (heat treatment) pada selang suhu (400-950) oC dengan variasi waktu pemanasan (holding time) yaitu 1 jam, 3 jam, 3,5 jam, dan  4 jam.  Sebelum dan sesudah proses perlakuan panas, struktur mikro sampel dianalisis menggunakan   mikroskop   optik   dan   SEM   (Scanning   Electron   Microscope). Komposisi kimia pada daerah di sekitar batas butir diamati menggunakan SEM-EDS (Energy  Dispersive  X-ray  Spectrometer).  Hasil  pengamatan  menunjukkan  bahwasampel yang mengalami perlakuan panas di bawah suhu sensitisasi yakni pada suhu400 oC, ternyata korosi antar butir tidak teramati. Untuk sampel yang mengalami perlakuan panas pada suhu sensitisasi yakni pada selang suhu (500-900) oC, ternyata korosi antar butir dapat teramati dengan jelas. Sedangkan untuk sampel yang mengalami perlakuan panas di atas suhu sensitisasi yaitu pada suhu 950 oC, ternyata korosi antar butir masih dapat teramati tetapi tidak sejelas sampel yang mengalami perlakuan panas pada suhu sensitisasi. Dari analisis komposisi kimia di sekitar batas butir ditemukan adanya penurunan kandungan karbon (C) yaitu dari 0,61 % massamenjadi 0,47 %massa, dan untuk khrom (Cr) dari 18,37 % massa menjadi 17,76 %massa. 

Analysis on Bursting of Rupture Disc Made by Inconel 600 Alloy

2019 ◽  
Vol 795 ◽  
pp. 290-295
Author(s):  
Jian Qun Tang ◽  
Lu Yang Geng ◽  
Jian Ming Gong
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Fatigue Fracture ◽  
Energy Dispersive Spectrometer ◽  
Energy Dispersive ◽  
Chemical Compositions ◽  
Inconel 600 ◽  
Rupture Disc ◽  
Inconel 600 Alloy ◽  
Scanning Electron

One conventional domed slotted rupture disc, which was fabricated with Inconel 600 alloy, was used in reaction kettle. It was burst after only 2000 times of operational circles. The burst causes were investigated. Morphologies of the fracture were observed by scanning electron microscope and the relatively chemical compositions were analyzed by energy dispersive spectrometer. Meanwhile, metallographic microstructures were also observed and analyzed for the material of the failure of the rupture disc. The results show that the bursting of the rupture disc was caused by fatigue fracture.

scholarly journals Identification and Determination of Metal Elements of Dates Syrup Extracted from Various Varieties Using SEM-EDS Technique

2019 ◽  
Vol 32 (2) ◽  
pp. 126-134
Author(s):  
Mohammad K. Al Hilfi ◽  
Dhia F. Al-Fekaiki ◽  
Asaad R. Al-Hilphy
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Energy Dispersive Spectrometer ◽  
Mineral Elements ◽  
Energy Dispersive ◽  
Hydraulic Pressure ◽  
Metal Elements ◽  
Date Syrup ◽  
Scanning Electron

This study has been conducted to determine and identify the metal elements of dates syrup extracted from Khstawy, Zehdy and Shukary using Scanning electron microscope-Energy dispersive Spectrometer (SEM-EDS) technique. The results showed that dates syrup was rich in both metal and non- metals elements. The obtained results showed some different trends in the date syrup content of mineral elements. The results showed the availability of Carbon (C) element in dates syrup extracted via hydraulic pressure from Khstawy (80.73%), Zehdy (65.28 %) and Shukary (68.49%) varieties while in dates syrup produced thermally (80.59%) and dates syrup produced without thermal (72.16%). Oxygen (O) ratio in Khstawy, Zehdy, Shukary, dates syrup produced thermally, and dates syrup produced without thermal were 18.92, 35.27, 15.26, 19.09 and 27.46 respectively. Moreover, the results showed the availability of sodium (Na) (0.17 %), sulphur (S) (0.11 %), potassium (K) (0.05%), silicon (Si) (0.03%) in the dates syrup extracted from Khstawy, while in Zehdy variety there was Aluminum (Al) (0.33%), potassium (K) (0.08%), chloride (Cl) (0.03%), magnesium (Mg) (0.01%). In Shukary variety, Al (5.24%), K (0.05%), nitrogen (N) (10.73%), (S) (0.06%), copper (Cu) (0.18%). Additionally, the results showed that the quantity of metal elements available in dates syrup produced thermally were found as follow as follows: Na (0.22%), S (0.1%) as well as O and C. Yet, the number of the metal elements in the dates syrup produced by hydraulic pressure was more that the dates syrup produced thermally are as follows: Na (0.1%), Al (0.1%), K (0.1%), S (0.02%), Si (0.03%) and phosphor (P) (0.02%).

Techniques for microdrop analysis of fluids (sweat, saliva, urine) with an energy-dispersive X-ray spectrometer on a scanning electron microscope

1978 ◽  
Vol 234 (3) ◽  
pp. F255-F259
Author(s):  
P. M. Quinton
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Quantitative Methods ◽  
Energy Dispersive Spectrometer ◽  
Energy Dispersive ◽  
X Ray ◽  
Low Concentrations ◽  
Biological Interest ◽  
Wide Range ◽  
Scanning Electron

Volumes of 10(-10) liter of sweat, saliva, and urine were analyzed with an energy-dispersive spectrometer (EDS) X-ray analyzer on a standard scanning electron microscope (SEM). Results of the EDS analysis of diluted and undiluted samples were verified by comparison with results of analyses of the same sample prepared by conventional quantitative methods. Except for Cl in concentrated urines and Mg in low concentrations, good agreement was found between the methods. The analysis provides quantitation of most elements of biological interest present in concentrations of about 1 mM, while it demonstrates good linearity (r greater than 0.99) throughout a wide range of commonly encountered biological concentrations. Reproducibility of the analysis is on the order of 2% and the minimal determinable concentration is generally between 0.5 and 1.0 mM for S, P, K, and Ca and slightly more than 1.0 mM for Mg.

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