Alloy softening in binary iron solid solutions

Stephens, J. R.; Witzke, W. R.

doi:10.1016/0022-5088(76)90009-6

Cited by 45 publications

(13 citation statements)

References 11 publications

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“…%) alloy than for Nb5 (~1 at. %) alloy after 400 h milling, in agreement with the expected increase of hardness as Nb increases in Fe based alloys [13]. Similar Cr contamination has been found in other ball milled…”

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confidence: 75%

Mechanical alloying of Fe100−−Nb B (x= 5, 10; y= 10, 15): From pure powder mixture to amorphous phase

et al. 2008

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The mechanical alloying process of Fe 75 Intermetallics. Vol. 16. Núm. 9. 2008. Pag. 1073-1082 http://dx.doi.org/10.1016/j.intermet.2008 2 1 Introduction Nanocrystalline materials are defined by a crystal size below 100 nm. As a limit, amorphous materials are solid systems where the structural long range order is lost.These materials have received much attention due to their physical properties (mechanical and magnetic), which are clearly different from those exhibited by conventional microstructures and, in some cases, improve their technological applicability [1,2,3]. One way to obtain nanocrystalline materials is by partial devitrification of a precursor amorphous alloy during controlled thermal annealing. This technique controls the microstructure of materials and thus optimizes the properties of the final product. Another possibility is mechanical alloying, which has become a very versatile technique to directly produce metastable microstructures (amorphous, nanocrystallines, supersaturate solid solution, etc) [1] from elemental powders or alloys.During this milling process the material is submitted to fracture and cold welding phenomena, as well as intensive plastic deformation, which define the powder morphology, microstruture and properties. The continuous storing of defects in the crystalline phase during milling process unstabilizes it, leading to nanocrystalline and/or amorphous structures [1].Nanocrystalline Fe-M-B type alloys (M= Zr, Nb, etc), so-called Nanoperm [4], are attractive due to their soft magnetic properties after optimum thermal treatment and are used in commercial applications such as telecommunications, micro devices and power electronics [5,6]. Although these systems are generally obtained by rapid quenching and subsequent annealing, nanocrystalline alloys of these compositions can be directly obtained by mechanical alloying of elemental powders. As soft magnetic properties depend on the structure of the material [7,8,9], its structural characterization Intermetallics. Vol. 16. Núm. 9. 2008. Pag. 1073-1082 http://dx.doi.org/10.1016/j.intermet.2008 3 is a very important task to understand the system behavior and to predict its possible technological capabilities.In this study, two Fe 100-x-y Nb x B y (x=5, y=10 and x=10, y=15) alloys were produced by mechanical alloying from a mixture of pure elements and their morphological, compositional and microstructural evolution, as well as their thermal stability, were studied as a function of milling time. The amorphization of the ternary FeNbB system by rapid quenching methods has been studied previously [10]. Whereas compositions similar to Nb10 can be obtained in amorphous structure, those similar to Nb5 can not be obtained as amorphous. ExperimentalFe 100-x-y Nb x B y (x=5, y=10 and x=10, y=15) compositions were prepared by ball milling in a planetary mill Fritsch Pulverisette 4 Vario from elemental powders ( 99 % purity), with particle size d <200 m for Fe and Nb and d <1 mm for B. For simplicity, the studied alloys will be ...

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Section: 1supporting

confidence: 75%

Mechanical alloying of Fe100−−Nb B (x= 5, 10; y= 10, 15): From pure powder mixture to amorphous phase

et al. 2008

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“…Some of the alloy disk specimens were annealed under a Vacuum of 10 -4 to 10 -5 pascal for 1 hour at the temperature where maximum solubility occurs in the a region. This anneal was followed by a 16 hour or more heating at 3000 C in order to produce single-phase, homog enized, equiaxed, strain-free specimens (ref, 7).…”

Section: Specimen Preparationmentioning

confidence: 99%

The Friction and Wear of Metals and Binary Alloys in Contact with an Abrasive Grit of Single-Crystal Silicon Carbide

Miyoshi

Buckley

1980

A S L E Transactions

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“…Leslie concluded fit review that the atomic size misfit parameter ii a reasonably good indicator of the strengthening of d-iron by the addition of low concentration of suh,titutional solutes (20). The present authors have already shown that the abrasion and friction are strongly related to the shear strength of the pure metals.…”

Section: Metallur_ical E(fec_tsmentioning

confidence: 69%