Correlations between apparent activation energy and thermostability and glass forming ability for Fe based metallic glasses

Ye, Bin; Zhang, Kai; Tan, H.; Li, Y.

doi:10.1016/j.jnoncrysol.2007.08.021

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Cited by 7 publications

(2 citation statements)

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“…In order to examine the thermal stability associated with crystallization kinetics for the Sm-La-Al-Ni-Cu-Fe glassy alloys, the apparent activation energies of the first-stage crystallization under continuous heating conditions are estimated by the Kissinger equation [19][20][21][22]:…”

Section: Resultsmentioning

confidence: 99%

Enhanced glass-forming ability of a Sm-based alloy with the addition of La

Pang

Zhang

2010

Journal of Alloys and Compounds

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Section: Resultsmentioning

confidence: 99%

Enhanced glass-forming ability of a Sm-based alloy with the addition of La

Pang

Zhang

2010

Journal of Alloys and Compounds

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“…Impurities added to the H13 steel that interfere with the diffusion-controlled transformation process such as TiC, CrC or rare earth elements would allow for lower cooling rates to obtain a glass structure and provide a wider potential processing range [35]. Fe base bulk glass metal sheets are already commercially available and are superformable above the glass transition temperature [37][38][39]. After thermal spraying a ceramic coating onto this, it could then be used as a die insert or cladding.…”

Section: Discussionmentioning

confidence: 99%

Laser Surface Modification of Tool Steel for Semi-Solid Steel Forming

Brabazon

Naher

Biggs

2008

SSP

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This paper presents an analysis of the effect of CO2 laser processing parameters on the surface modification and heat treatment of steels. The CO2 laser and sample movement process parameters are presented. The controlled operation of these in conjunction with each other is required to obtain better surface hardness and structure. H13 tool steel samples were rotated at high speeds to keep exposure times below 0.3s. Laser processed samples were analysed using EDX spectroscopy, optical microscopy, Vickers and Martens micro-hardness testing, and X-ray diffraction (XRD). Results show how the hardness profile through the surface is related to the laser treatment and resultant microstructures. Increased surface hardness was noted due to a complete microstructural transformation to an amorphous state in the glazed samples. The usefulness of such coatings on tool steels, in conjunction with other thermal barriers, for the forming of semi-solid steel alloys is presented.

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