Influence of Si and Prior Heat Treatment on Long-Term Thermal Stability of 100Cr6-Type Bearing Steels

Abstract This paper is addressed to comparative study of changes in thermal stability of surface-modified hemp-hurds aggregates long-term incorporated in bio-aggregate-based composites with the original ones before their integration into alternative binder matrix. In this study, the effectiveness of alkaline treatment of hemp hurds compared to the raw bio-aggregates as well as in relation to their behaviour when they are long-term incorporated in the MgO-cement environment is investigated. The differences in the thermal behaviour of the samples are explained by the changed structure of hemp hurds constituents due to the pre-treatment and long-term action of the alternative binder components on the bio-aggregates. Alkaline treatment increases thermal stability of hemp hurds compared to raw sample. Also long-term incorporation of hemp hurds in MgO-cement matrix had a similar effect in case of alkaline modified bio-aggregates. The more alkali ions present in the structure of hemp hurdssamples, the more ash is formed during their thermal decomposition studied by thermal gravimetry (TG) and differential scanning calorimetry (DSC).

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Effect of Pre-Strain Rolling on Annealing Behavior of Friction-Stir Welded AA6061-T6 Aluminum Alloy

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.385.355 ◽

2018 ◽

Vol 385 ◽

pp. 355-358 ◽

Cited By ~ 2

Author(s):

Sergey Mironov ◽

Sergey Malopheyev ◽

Igor Vysotskiy ◽

Daria Zhemchuzhnikova ◽

Rustam Kaibyshev

Keyword(s):

Heat Treatment ◽

Thermal Stability ◽

Aluminum Alloy ◽

Cold Rolling ◽

Grain Growth ◽

Rolling Schedule ◽

Annealing Behavior ◽

Friction Stir ◽

Welding Direction ◽

Thermal Stability Of

In this work, the effect of pre-strain cold rolling on thermal stability of friction-stir welded AA6061-T6 alloy was studied. The pre-strain rolling was found to be very effective in suppression of abnormal grain growth during standard post-weld T6 heat treatment. It was also shown that the efficiency of this approach essentially depends on rolling path and the rolling along welding direction was the most effective rolling schedule.

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Simultaneous Improvement of the Long‐Term and Thermal Stability of the Perovskite Solar Cells Using 2,3,4,5,6‐Pentafluorobenzoyl Chloride (PFBC)‐Capped ZnO Nanoparticles Buffer Layer

Solar RRL ◽

10.1002/solr.202000289 ◽

2020 ◽

Vol 4 (10) ◽

pp. 2000289

Author(s):

Irfan Ismail ◽

Junfeng Wei ◽

Xue Sun ◽

Wusong Zha ◽

Maria Khalil ◽

...

Keyword(s):

Thermal Stability ◽

Solar Cells ◽

Buffer Layer ◽

Zno Nanoparticles ◽

Perovskite Solar Cells ◽

Thermal Stability Of

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Thermal stability of a Stellite/steel hardfacing interface during long-term aging

Materials Characterization ◽

10.1016/j.matchar.2019.05.025 ◽

2019 ◽

Vol 154 ◽

pp. 181-192 ◽

Cited By ~ 3

Author(s):

Yuxiao Wu ◽

Etienne Bousser ◽

Thomas Schmitt ◽

Nabil Tarfa ◽

Fadila Khelfaoui ◽

...

Keyword(s):

Thermal Stability ◽

Thermal Stability Of

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Synthesis of Fe-rich Fe–Al nanocrystalline solid solutions using ball milling

Journal of Materials Research ◽

10.1557/jmr.1999.0238 ◽

1999 ◽

Vol 14 (5) ◽

pp. 1760-1770 ◽

Cited By ~ 18

Author(s):

H. G. Jiang ◽

H. M. Hu ◽

E. J. Lavernia

Keyword(s):

Heat Treatment ◽

Activation Energy ◽

Thermal Stability ◽

Intermetallic Compound ◽

Ball Milling ◽

Microstructural Evolution ◽

Solid Solutions ◽

Al Alloys ◽

Time Intervals ◽

Thermal Stability Of

The synthesis of nanocrystalline Fe, Fe–4 wt% Al, and Fe–10 wt% Al solid solutions by SPEX ball milling has been studied. The microstructural evolution during ball milling, as well as subsequent heat treatment, has been characterized. The results demonstrate that ball milling promotes the formation of αFe–4 wt% Al and αFe–10 wt% Al solid solutions by reducing the activation energy of these alloys and generating thermal energy during this process. For Fe–10 wt% Al powders milled for various time intervals up to approximately 20 min, the FeAl intermetallic compound is formed. For alloys annealed at temperatures ranging from 600 to 1000 °C, the addition of 10 wt% Al to Fe significantly enhances the thermal stability of the nanocrystalline Fe–Al alloys. Interestingly, the addition of Al within the range of 4–10 wt% seems to have little effect on the thermal stability of these alloys annealed under the same conditions. Also, the thermal stability improves for alloys milled in air as opposed to those processed using Ar.

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Improvement of Thermal Stability of Nd-Tb-Fe-Co-B Sintered Magnets by Additions of Pr, Ho, Al, and Cu

Physics Research International ◽

10.1155/2012/416717 ◽

2012 ◽

Vol 2012 ◽

pp. 1-4 ◽

Cited By ~ 1

Author(s):

A. A. Lukin ◽

E. I. Il'yashenko ◽

A. T. Skjeltorp ◽

G. Helgesen

Keyword(s):

Heat Treatment ◽

Thermal Stability ◽

Magnetic Properties ◽

Thermal Treatment ◽

Temperature Interval ◽

Magnetic Parameters ◽

Sintered Magnets ◽

Additional Doping ◽

As Solubility ◽

Thermal Stability Of

The present work investigates the influence of Pr, Al, Cu, B and Ho which were introduced into the Co-containing sintered magnets of Nd-Dy-Tb-Fe-Co-B type on the magnetic parameters (α, Hci, Br, BHmax⁡). The effect of heat treatment parameters on magnetic properties was also studied. It was revealed that the essential alloying of NdFeB magnets by such elements as Dy, Tb, Ho, Co as well as by boron-forming elements, for example, by titanium, may lead to reducing of F-phase quantity, and, as a consequence, to decreasing of magnetic parameters. It was also shown that additional doping of such alloys by Pr, B, Al and Cu leads to a significant increase of the quantity of F-phase in magnets as well as solubility of the Dy, Tb, Ho and Co in it. This promotes the increase of magnetic parameters. It was possible to attain the following properties for the magnets (Nd0,15Pr0,35Tb0,25Ho0,25)15(Fe0,71Co0,29)bal ⋅ Al0,9Cu0,1B8,5 (at. %) after optimal thermal treatment {1175 K (3,6–7,2 ks) with slow (12–16 ks) cooling to 675 K and subsequently remaining at T=775 K for 3,6 ks—hardening}: Br=0,88 T, Hci=1760 kA/m, BHmax⁡=144 kJ/m3, α<|0,01|%/K in the temperature interval 223–323 K.

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