Fracture Surface Characterization of Commercial Graphite/Epoxy Systems

2009 ◽  
pp. 223-223-51 ◽  
Author(s):  
AG Miller ◽  
AL Wingert
Keyword(s):  
Fracture Surface ◽  
Surface Characterization ◽  
Epoxy Systems

scholarly journals Pengaruh Perlakuan Panas Karburisasi Austemper pada Baja Laterit Paduan Cr-Mo terhadap Sifat Mekanik dan Struktur Mikro

2020 ◽  
Vol 10 (1) ◽  
pp. 19
Author(s):  
Satrio Herbirowo ◽  
Vinda Puspasari ◽  
M. Iqbal Primatama ◽  
Hendrik Hendrik ◽  
I Nyoman Gede Putrayasa Astawa ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Fracture Surface ◽  
Surface Characterization ◽  
Impact Test ◽  
Optical Microscope ◽  
Air Blowing ◽  
Sample Characterization ◽  
Cooling Media ◽  
Steel Heat

This research was aimed to do heat treatment of austemper carburization and investigate the effect of various cooling media on mechanical properties and microstructure of Cr-Mo alloy lateritic steel. Heat treatment was conducted to austenisation temperature at 950o C for 1 hour and austemper carburization at 400o C for 1 hour. Variation of cooling media included air blowing for 1 hour, water, and furnace cooling for 24 hours. Hardness and impact test were done using Hardness Rockwell and Charpy methods. Microstructure was observed using optical microscope. Fracture surface characterization was using SEM-EDX. The results showed the highest hardness of 65.48 HRC in sample that cooled by air blowing for 1 hour. The microstructure of this sample showed phases of ferrite, pearlite and martensite which causing higher hardness. The highest impact strength of 20 Joule took place in the furnace cooled sample. Characterization of the fracture surface using SEM-EDX showed dimple of ductile fractures.Penelitian ini bertujuan untuk melakukan proses perlakukan panas karburisasi austemper dan mempelajari pengaruh media pendinginan terhadap sifat mekanik dan struktur mikro baja laterit paduan Cr-Mo. Perlakuan panas yang dilakukan yaitu pemanasan sampel pada temperatur austenisasi (950o C) selama 1 jam dan proses karburisasi austemper dengan media serbuk arang halus pada temperatur 400o C selama 1 jam. Variasi pendinginan yang digunakan yaitu air blowing (semburan udara) selama 1 jam, air dan tungku selama 24 jam. Pengujian kekerasan dilakukan dengan metode Rockwell Hardness dan pengujian impak dilakukan dengan metode charpy. Karakterisasi struktur mikro dilakukan dengan proses metalografi dan mikroskop optik. Karakterisasi permukaan patahan pengujian impak dilakukan dengan SEM-EDX. Hasil penelitian ini menunjukkan nilai kekerasan tertinggi yaitu 65,48 HRC terjadi pada sampel dengan air blowing selama 1 jam. Struktur mikro sampel tersebut menunjukkan adanya fasa ferit, perlit dan martensit yang membuat sampel menjadi keras. Nilai kekuatan impak tertinggi sebesar 20 Joule terjadi pada sampel dengan pendinginan di dalam tungku selama 24 jam. Karakterisasi permukaan patahannya menggunakan SEM-EDX menunjukkan adanya dimple dari patah ulet.

Tensile strength and fracture surface characterization of Hi-Nicalon™ SiC fibers

2001 ◽  
Vol 289 (1-2) ◽  
pp. 1-9 ◽  
Author(s):  
G.E. Youngblood ◽  
Charles Lewinsohn ◽  
R.H. Jones ◽  
Akira Kohyama
Keyword(s):  
Tensile Strength ◽  
Fracture Surface ◽  
Surface Characterization ◽  
Sic Fibers

scholarly journals Fracture surface characterization of laser welding processed Ti alloy to stainless steel joints

2018 ◽  
Vol 62 (5) ◽  
pp. 947-960 ◽  
Author(s):  
Seyed Reza Elmi Hosseini ◽  
Kai Feng ◽  
Pulin Nie ◽  
Ke Zhang ◽  
Jian Huang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Fracture Surface ◽  
Laser Welding ◽  
Surface Characterization ◽  
Ti Alloy ◽  
Steel Joints

The Use of Advanced Analytical Techniques for Characterization of the Chemical, Physical, and Crystallographic Nature of a Surface

1973 ◽  
Vol 31 ◽  
pp. 132-133 ◽  
Author(s):  
R. E. Herfert
Keyword(s):  
Surface Characterization ◽  
Analytical Techniques ◽  
X Ray Diffraction ◽  
Depth Of Penetration ◽  
X Ray ◽  
The Past ◽  
Transmission Electron ◽  
Scanning Electron

Studies of the nature of a surface, either metallic or nonmetallic, in the past, have been limited to the instrumentation available for these measurements. In the past, optical microscopy, replica transmission electron microscopy, electron or X-ray diffraction and optical or X-ray spectroscopy have provided the means of surface characterization. Actually, some of these techniques are not purely surface; the depth of penetration may be a few thousands of an inch. Within the last five years, instrumentation has been made available which now makes it practical for use to study the outer few 100A of layers and characterize it completely from a chemical, physical, and crystallographic standpoint. The scanning electron microscope (SEM) provides a means of viewing the surface of a material in situ to magnifications as high as 250,000X.

Surface Characterization of Functionalized Imidazolium-Based Ionic Liquids

Langmuir ◽  
2008 ◽  
Vol 24 (17) ◽  
pp. 9500-9507 ◽  
Author(s):  
Claudia Kolbeck ◽  
Manuela Killian ◽  
Florian Maier ◽  
Natalia Paape ◽  
Peter Wasserscheid ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Surface Characterization
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