scholarly journals Alloy Development through Rapid Solidification for Soft Magnetic Application

10.5772/60772 ◽  
2015 ◽  
Author(s):  
Rajat K. Roy ◽  
Ashis K. Panda ◽  
Amitava Mitra
Keyword(s):  
Rapid Solidification ◽  
Alloy Development ◽  
Soft Magnetic

The Status and Potential of Rapid Solidification of Magnesium Alloys

1985 ◽  
Vol 58 ◽  
Author(s):  
F. Hehmann ◽  
H. Jones
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloys ◽  
Rapid Solidification ◽  
Low Cost ◽  
Engineering Properties ◽  
Low Density ◽  
Critical Survey ◽  
Alloy Development ◽  
Subsequent Work ◽  
The Status

ABSTRACTIn spite of giving exceptionally low density and excellent machinability at relatively low cost, magnesium alloys have found only restricted application as engineering materials to date because of limitations in formability, corrosion resistance, strength and creep resistance. Although the very earliest work on record to employ rapid solidification as a means to enhance engineering properties was carried out on magnesium-base alloys, subsequent work employing more modern techniques has not, until very recently, been motivated by the need for alloy development. The present study combines a critical survey of relevant published work with an assessment of the potential of magnesium-base alloys for development by the rapid solidification route.

The effect of rapid solidification by spinning and laser melting On the structure of sendust-type alloys

1994 ◽  
Vol 362 ◽  
Author(s):  
Elena N. Sheftel ◽  
Dmitry E. Kaputkin ◽  
Raissa E. Stroug
Keyword(s):  
Solid Solution ◽  
Grain Size ◽  
Wear Resistance ◽  
Rapid Solidification ◽  
Magnetic Alloy ◽  
Dispersion Strengthening ◽  
Soft Magnetic ◽  
Laser Melting ◽  
Soft Magnetic Alloy ◽  
Boride Phases

AbstractDispersion strengthening of the most wear-resistant soft magnetic alloy Sendust (Fe-9.5 wt.%Si -5.5 wt.% Al, HV=5000 MPa) by carbide and boride phases allowed to increase its wear-resistance by a factor of 2 to 3. Hardness of the dispersion strengthened alloys is HV=5500–6250 MPa. The changes in grain size, ordering and hardness of the Sendust and two dispersion strengthened alloys have been studied after spinning and various regimes of laser melting. Both types of rapid solidification caused a significant decrease of both the solid solution grain size and the size of carbide and boride phases. While spinning only significantly decreased the amount of ordered Fe3(Si,Al) phase in all the alloys, laser melting completely suppressed the ordering. The hardness of the boride strengthened alloy increased up to 7550 MPa after laser melting.

Laser surface cladding: The state of the art and challenges

2010 ◽  
Vol 224 (5) ◽  
pp. 1041-1060 ◽  
Author(s):  
M Zhong ◽  
W Liu
Keyword(s):  
Rapid Solidification ◽  
Laser Cladding ◽  
Systems Engineering ◽  
Complex Geometry ◽  
State Of The Art ◽  
Composite Coatings ◽  
The State ◽  
Material Surface ◽  
Laser Fusion ◽  
Alloy Development

Laser cladding is a process whereby a new layer of material is deposited on a substrate by laser fusion of blown powders or pre-placed powder coatings. Multiple layers can be deposited to form shapes with complex geometry. This manufacturing process has been used for material surface property modification and for the repair and manufacture of three-dimensional components. Laser cladding has attracted extensive research over the past 30 years. Over 2000 research papers have been published in journals and international conferences. Research in laser cladding covers many scientific issues, including processing techniques, physical and chemical properties of deposited materials and clad—substrate interfaces, microstructure and phases, rapid solidification phenomena, modelling and simulation, and systems engineering and applications. This article, focusing on the rapid heating/cooling processes and material response, summarizes the state of the art on two fundamental scientific aspects: rapid solidification and the material characteristics. The article includes a review of the microstructural refinement, extended solid solution, metastable phases, amorphous structure, and directional solidification. In addition, the article discusses the progress and state of the art in laser cladding of commercial alloy powders, carbides and intermetallics, in-situ synthesized particulate reinforced metal matrix composite coatings, compositional gradient materials, and alloy development. Laser cladding is capable of producing materials with designed macro/microstructures and properties.

Effects of Annealing on Electrochemical Corrosion of Fe73.5Si13.5B9Nb3Cu1 Alloys

2011 ◽  
Vol 345 ◽  
pp. 83-86
Author(s):  
Ming Sheng Li ◽  
Jin Wei Tu ◽  
Shu Juan Zhang
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Corrosion Rate ◽  
Electrochemical Impedance ◽  
Amorphous State ◽  
Electrochemical Corrosion ◽  
Soft Magnetic Properties ◽  
Alloy Development ◽  
Soft Magnetic ◽  
Corrosion Characteristic

The electrochemical corrosion affects soft-magnetic properties and service life of amorphous or nanocrystalline Fe73.5Si13.5B9Nb3Cu1 alloys. Therefore it is important to characterize the corrosion characteristic of the alloys for their potential application to engineering fields and further alloy development. In this study, the corrosion behavior of nanocrystalline Fe73.5Si13.5B9Nb3Cu1 alloys prepared by crystallization from the amorphous state was studied and compared with that of their amorphous counterparts by linear polarization (PLZ) and electrochemical impedance spectroscopy (EIS) technique. In electrolyte of 0.01 M NaCl, annealing at 550 °C leads to the decreased corrosion rate, while crystallization at 650 °C gives rise to the increase of corrosion rate. In the blend solution of 0.1 M NaCl and 0.1 M NaOH, heat-treatment at 550 °C or 650 °C improves the corrosion resistance for the alloys.

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