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Authors: ZHOU Tongjun
This paper describes the development of argon protection in the ingot casting process, and the production process of totally enclosed argon protection in a 40-tons production line. The influences of some related factors on the oxygen content are analyzed.
Control Of Internal Cracks In The Ingots Of Fe-Cr-Al Alloy Produced By Electroslag Remelting Process
Authors: Weihua Zhang, Shufeng YangR, Jingshe Li, Xiangzhou Gao
The reasons caused internal cracks in the 200 kg Fe-Cr-Al alloy ingot produced by electroslag remelting (ESR) process were analyzed by industrial experiments and the effects of mold structure, cooling method and intensity, and heating voltage and current were included.
Authors: Gang Li, Shufeng Yang, Jing she Li, Xiangzhou Gao
Arcing can result in arc point on the ingot surface in Electroslag Remelting process, which influences the quality of ingot. In this paper, a 200 kg iron-chromium alloy ingot was employed to study the formation mechanisms of arc point by industrial trials.
Authors: Miguel Angel Barbes, Jose Ignacio Verdeja, Maria Jose Quintana, Luis Felipe Verdeja, Roberto Gonzalez
The microstructure of Pressure Die Casting of an Al-8.5 Si-3.5 Cu alloy used for clean room tiles shows amount of constituents (eutectic and Si phases) that do not correspond to the ones indicated by the phase diagram. Furthermore, there are differences in amount of constituents between the core and the surface zones of parts produced by this process.
Authors: S.W. Hudson, D. Apelian
Aluminum alloy castings are becoming commonplace for critical applications in the automotive and aerospace industries where materials failure is not an option. In order to meet such property demands, tight control over the cleanliness of the melt (mitigation of solid particle inclusions) and microstructure must be achieved. In order to control cleanliness, it must first be well defined and measured.
New Simple Approaches For Designing Eco-Friendly Smart And Functional Coatings For Industrial Applications
Authors: Abdel Salam Hamdy Makhlouf
A new class of 'smart' or 'self-healing' advanced coatings of multifunctional properties has been developed during the last decade. Such properties add functionality to the materials of construction to protect themselves automatically after mechanical, physical or chemical damages. However, most of the smart coatings techniques available are quite expensive and need further investigation for possible use in real industrial applications.
Efficient Method Of Structural And Electronic Properties Modification Of Amorphous As-S-Se Chalcogenide Films
Authors: Korobova N., Almasov N., Prikhodko O., Timoshenkov S., Tsendin K.
Chalcogenide glassy semiconductors (CGS) are promising materials for various elements of electronic and optical instrumentation creation. These semiconductors are unique objects of various electronic processes investigation in structurally disordered condensed media [1, 2], Representation of CGS atomic structure is continuously evolving.
Monitoring Technology For Integrity Management Of The Hull Structure Of Floating Production, Storage And Offloading (Fpso) Vessel
Authors: Shan Guan; Graeme Ripley
The FPSO vessel is prone to corrosion and corrosion-induced structural degradation because of the saline marine environment and continuous loading/offloading operation. To assure the structural integrity and safe operation, they must be inspected periodically, and ideally continuously monitored. 16 types of sensing technologies were identified for monitoring of FPSO Vessel.
Authors: A. Herrera, A. Forero, R. P. Silva, S. Bott
In the pre-salt fields, in Brazil, oil recovery has been increased by re-injecting carbon dioxide extracted from the wells. Deeper oil/gas reservoirs contain large quantities of CO2 and, therefore, CO2 corrosion is an up to date issue and as such newer attempts are been made to study the mechanisms of the C02 corrosion.
Nacl-Induced Atmospheric Corrosion Of Two Mgal Alloys In Semi-Solid Cast And Diecast States - Influence Of Microstructure And Co2
Authors: M. Shahabi-Navid, M. Esmaily, Y. Cao, L.-G. Johansson, J.-E. Svensson
The atmospheric corrosion of MgAl alloys AM50 and AZ91 was studied in the laboratory at constant (95.0%) relative humidity and 22 C, in the presence and absence of 400 ppm C 0 2. NaCl was added prior to exposure. The materials were in semi-solid cast (SSC) and pressure diecast (DC) states. Crystalline corrosion products were identified by X-ray diffraction (XRD). Alloy microstructure and corrosion morphology were characterized by scanning electron microscopy (SEM).