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Institution

Aperam

About: Aperam is a based out in . It is known for research contribution in the topics: Corrosion & Recrystallization (metallurgy). The organization has 200 authors who have published 208 publications receiving 1529 citations.


Papers
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Journal ArticleDOI
TL;DR: In this article, the authors measured the stored energy in two Fe-48%Ni cold-rolled samples using three different approaches: the neutron diffraction method based on peak broadening, the Kernel Average misorientation (KAM) and the Dillamore methods both based on the misoriented and dislocation cell size estimation using EBSD (Electron Back Scatter Diffraction) data.
Abstract: The stored energy, which is the main driving energy of the primary recrystallization, was measured in two Fe–48%Ni cold-rolled samples using three different approaches: the neutron diffraction method based on the peak broadening, the Kernel Average misorientation (KAM) and the Dillamore methods both based on the misorientation and dislocation cell size estimation using EBSD (Electron Back Scatter Diffraction) data. The results were compared with each other and showed differences in stored energy values. In this paper, it is demonstrated that the stored energy calculated by both KAM and Dillamore approaches is underestimated compared to that one calculated from neutron diffraction peak broadening. This is because Dillamore approach considers only the GND (Geometrically Necessary Dislocations), blocked in the cell walls, the KAM method takes into account only the GND in all of the microstructure (cells and walls) and the neutron diffraction method takes into consideration all types of dislocations (SSD (Statistically Stored Dislocations) and GND) within the microstructure. The measurement principle and the energy gap observed between the different approaches were discussed.

87 citations

Journal ArticleDOI
TL;DR: In this article, the synthesis of carbon nanomaterials (CNMs) by up-cycling common solid wastes is addressed, and the structure of the resulting CNMs is determined by the feedstock type, through the disparate mixtures of carbon-bearing gases generated when different feedstocks are pyrolyzed.
Abstract: This work addresses the synthesis of carbon nanomaterials (CNMs) by up-cycling common solid wastes. These feedstocks could supersede the use of costly and often toxic or highly flammable chemicals, such as hydrocarbon gases, carbon monoxide, and hydrogen, which are commonly used as feedstocks in current nanomanufacturing processes for CNMs. Agricultural sugar cane bagasse and corn residues, scrap tire chips, and postconsumer polyethylene (PE) and polyethylene terephthalate (PET) bottle shreddings were either thermally treated by sole pyrolysis or by sequential pyrolysis and partial oxidation. The resulting gaseous carbon-bearing effluents were then channeled into a heated reactor. CNMs, including carbon nanotubes, were catalytically synthesized therein on stainless steel meshes. This work revealed that the structure of the resulting CNMs is determined by the feedstock type, through the disparate mixtures of carbon-bearing gases generated when different feedstocks are pyrolyzed. CNM characterization was co...

65 citations

Journal ArticleDOI
TL;DR: In this article, the surface oxide films formed after mechanical polishing on duplex stainless steel and corresponding single phase alloys were characterized by XPS and ToF-SIMS, and the contents of alloying elements in the oxide layer and/or in the underlying metal were found to be directly related to their content in the bulk of the alloys.

64 citations

Journal ArticleDOI
TL;DR: In this paper, the production of carbon nanomaterials (CNMs) by catalytic conversion of wastes from the bioethanol industry, in the form of either sugarcane bagasse or corn-derived distillers dried grains with solubles (DDGS), was investigated.
Abstract: This work addressed the production of carbon nanomaterials (CNMs) by catalytic conversion of wastes from the bioethanol industry, in the form of either sugarcane bagasse or corn-derived distillers dried grains with solubles (DDGS). Both bagasse and DDGS were pyrolysed at temperatures in the range of 600–1000 °C. The pyrolyzate gases were then used as CNM growth agents by chemical vapor deposition on stainless steel meshes, serving as both catalysts and substrates. CNM synthesis temperatures of 750–1000 °C were explored, and it was determined that their growth was most pronounced at 1000 °C. The nanomaterials produced from pyrolysis of bagasse were in the form of long, straight, multi-wall nanotubes with smooth walls and axially uniform diameters. Typical lengths were circa 50 μm and diameters were in the range of 20–80 nm. The nanomaterials produced from pyrolysis of DDGS were in the form of long, entangled, rope-like structures with rugged walls, and axially non-uniform diameters. Typical diameters were in the range of 100–300 nm and their lengths were in the tens of microns. This process also produces a bio-syngas byproduct that is enriched in hydrogen.

54 citations

Journal ArticleDOI
TL;DR: The relationship between microstructure and high temperature ductile tearing in duplex stainless steels has been investigated in this paper, where several grades were considered corresponding to different chemical compositions, different volume fractions and morphologies of the ferrite and austenite phases and different oxide inclusion contents.

44 citations


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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20221
202115
202016
201923
201815
201714