The Effect of Temperature and Time on the Formation of a Reaction Interlayer During Aluminizing of a Carbon Steel

2009 ◽  
Vol 1242 ◽  
Author(s):  
R. Torres ◽  
V.H. López ◽  
J.P. Arredondo ◽  
R. García ◽  
J.A. Verduzco ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Kinetic Study ◽  
Microstructural Characterization ◽  
Tube Furnace ◽  
Effect Of Temperature ◽  
Second Phase ◽  
Growth Profiles ◽  
Isothermal Growth ◽  
Steel Substrates

ABSTRACTA kinetic study was performed on the growth of a reaction interlayer between molten Al and carbon steel substrates at temperatures between 665 to 820°C by holding Al/flux/steel assemblies, in a tube furnace, at temperature for times up to 120 min. An Ar atmosphere and a K-Al-F based flux were used to enable spreading of molten Al on the steel substrates. Chemical and microstructural characterization of the samples revealed that the interlayer is composed of FeAl3 and Fe2Al5, being the second phase significantly thicker. The Fe2Al5 phase grows toward the steel with a tongue like morphology. Isothermal growth profiles of the reaction interlayer followed a parabolic behavior, meaning that at the beginning the reaction is very rapid and once that a continuous interlayer is formed the growth of the interlayer is controlled by interdifussion of species across the interlayer.

scholarly journals Optical characterization of Zn coatings deposited on low carbon steel substrates

2012 ◽  
Vol 356 ◽  
pp. 012017
Author(s):  
G Bodurov ◽  
N Boshkov ◽  
L Lutov ◽  
T Ivanova ◽  
K A Gesheva
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Optical Characterization ◽  
Low Carbon ◽  
Steel Substrates

Nanoscale Three-Dimensional Microstructural Characterization of an Sn-Rich Solder Alloy Using High-Resolution Transmission X-Ray Microscopy (TXM)

2016 ◽  
Vol 22 (4) ◽  
pp. 808-813 ◽  
Author(s):  
Chandrashekara S. Kaira ◽  
Carl R. Mayer ◽  
V. De Andrade ◽  
Francesco De Carlo ◽  
Nikhilesh Chawla
Keyword(s):  
Fresnel Zone ◽  
Three Dimensional ◽  
Microstructural Characterization ◽  
Second Phase ◽  
Full Field ◽  
X Ray ◽  
Second Phase Particles ◽  
Rich Alloy ◽  
Nanoscale Features

AbstractThree-dimensional (3D) nondestructive microstructural characterization was performed using full-field transmission X-ray microscopy on an Sn-rich alloy, at a spatial resolution of 60 nm. This study highlights the use of synchrotron radiation along with Fresnel zone plate optics to perform absorption contrast tomography for analyzing nanoscale features of fine second phase particles distributed in the tin matrix, which are representative of the bulk microstructure. The 3D reconstruction was also used to quantify microstructural details of the analyzed volume.

Microstructural characterization of warm rolled Cr-containing low carbon steel

2007 ◽  
Vol 56 (6) ◽  
pp. 521-524 ◽  
Author(s):  
E.V. Pereloma ◽  
I.B. Timokhina ◽  
J.J. Jonas ◽  
M.K. Miller
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Microstructural Characterization ◽  
Low Carbon

Effect of Upset Current in Magnetically Impelled Arc Butt (MIAB) Welding of Carbon Steel Tubes

2014 ◽  
Vol 592-594 ◽  
pp. 240-244 ◽  
Author(s):  
R. Sivasankari ◽  
V. Balusamy ◽  
G. Buvanashekaran
Keyword(s):  
Carbon Steel ◽  
Short Pulse ◽  
Welding Process ◽  
Microstructural Characterization ◽  
Weld Interface ◽  
Steel Tubes ◽  
Weld Properties ◽  
Miab Welding ◽  
Outside Diameter

Magnetically Impelled Arc Butt (MIAB) welding is an unique forge welding process in which an arc is drawn in the gap between the two tubes to be welded in order to raise them to a high temperature to allow forging to form a solid state weld. This paper presents the investigations carried out on MIAB welding trials of carbon steel tubes with varying upset current. Upset current is the short pulse of high current applied prior to upset. It plays a significant role in expulsion of molten metal and impurity from weld interface. This study aims at studying the effect of upset current on weld properties. Carbon steel tubes of SA-210 Grade A have been chosen with outside diameter of 44 mm and thickness of 4.5 mm. Mechanical and microstructural characterization of MIAB weldments was carried out. Good correlation exists between the mechanical properties/microstructure and upset current. Lower upset current has detrimental effect on weld tensile strength due to incomplete expulsion of decarburized zone.

Microstructural Characterization of Dual and Multiphase Steels Applied to Automotive Industry

2014 ◽  
Vol 775-776 ◽  
pp. 146-150 ◽  
Author(s):  
Cristina Sayuri Fukugauchi ◽  
Antonio dos Reis Faria Neto ◽  
Rosinei Batista Ribeiro ◽  
Marcelo dos Santos Pereira
Keyword(s):  
Mechanical Properties ◽  
Microstructural Characterization ◽  
Tensile Tests ◽  
Ferrite Matrix ◽  
Microstructure Characterization ◽  
Second Phase ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Trip Steels

TRIP (Transformation Induced Plasticity) and DP (Dual-Phase) steels are written in a new series of steels which present excellent mechanical properties. As for microstructure aspect, TRIP steels consist on a ferrite matrix with a second phase dispersion of other constituents, such as bainite, martensite and retained austenite, while dual-phase steels consist on martensite dispersion in a ferrite matrix. In order to identify the different microconstituents present in these materials, microstructure characterization techniques by optical microscopy (using different etchants: LePera, Heat-Tinting and Nital) and scanning electron microscopy were carried out. This being so, microstructures were correlated with mechanical properties of materials, determined by means of tensile tests. It is concluded that steels assisted by TRIP effect have a strength and elongation relation higher than the dual-phase one. With microstructure characterization, it was observed phases present in these materials microstructure.

Analytical Characterization and Corrosion Behavior of Non-Functional Bis-Silane Pre-Treated Carbon Steel Substrates

2009 ◽  
Vol 79-82 ◽  
pp. 1091-1094
Author(s):  
Hai Ying Zhu ◽  
Yan Chen ◽  
Yun Ping Liu ◽  
Wei Wei Sun ◽  
Shou Gang Chen
Keyword(s):  
Carbon Steel ◽  
Corrosion Behavior ◽  
Electrochemical Impedance ◽  
Good Adhesion ◽  
Adhesion Properties ◽  
Analytical Characterization ◽  
Treated Carbon ◽  
Steel Substrates ◽  
Scanning Electron

The present work aims at studying the corrosion resistance of carbon steel substrates pre-treated with bis-[triethoxysilylpropyl] tetrasulfide (BTESPT) solutions. The corrosion behavior of the pre-treated substrates during immersion in seawater was assessed by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. The analytical characterization of the silane films was performed by scanning electron microscopy (SEM). The results show that the pre-treatments based on silanes provide good corrosion protection of carbon steel substrates and the bis-silane film has good adhesion properties.

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