Aluminium nitride in steel

Wilson, F. G.; Gladman, T.

doi:10.1179/095066088790324102

Cited by 59 publications

(66 citation statements)

References 9 publications

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“…For the lower Ti steel, steel 1, most of the coarser particles were MnS inclusions which generally seemed to be attached to AlN precipitates, Fig 8a and these were located in the matrix. AlN is very sluggish in precipitating out [19] after melting and cooling to room temperature and previous work has shown that MnS particles provide good nucleation sites for the AlN [5]. When the S level is low, as in the present work, AlN precipitation is restricted because of the lack of MnS nucleation sites and seems then to be mainly in the matrix.…”

Section: Optical Microscopymentioning

confidence: 44%

Hot ductility of high Al TWIP steels containing Nb and Nb-V

Qaban

Mintz

Kang

et al. 2017

Materials Science and Technology

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This is the accepted version of the paper.This version of the publication may differ from the final published version. The hot ductility of B-Ti-Nb-high Al (1.5%Al) containing TWIP steels having Ti/N ratios mainly in excess of 3.4/1 was obtained. After soaking at 1250 o C, the tensile specimens were cooled at 12 or 60 o C/min to the test temperature and then strained to failure at 3X10 -3 /sec Ductility was always good (reduction of area>40%), independent of Ti/N ratio or cooling rate. The good ductility is due to B segregation strengthening the grain boundaries and the low S level (0.005%S) limiting the volume fraction of MnS inclusions and restricting AlN precipitation to the matrix. PermanentIncreasing the cooling rate, higher N levels and Nb resulted in a small improvement in ductility. An addition of V to the Nb containing steels caused a slight deterioration in the hot ductility.

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Section: Optical Microscopymentioning

confidence: 44%

Hot ductility of high Al TWIP steels containing Nb and Nb-V

Qaban

Mintz

Kang

et al. 2017

Materials Science and Technology

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“…Two of the well-established microstructural characteristics known to control both strength and toughness properties in steels are grain size and precipitates/inclusions [7][8][9][10] . Petch was the first to attempt to relate impact toughness to microstructure in terms of grain size.…”

Section: Austenite Grain Growth Controlmentioning

confidence: 99%

Role of zirconium in microalloyed steels: A review

Baker

2015

Materials Science and Technology

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Recently there has been a renewed interest in the addition of zirconium to microalloyed steels. It has been used since the early 1920's, but has never been universally employed, as have niobium, titanium or vanadium. The functions of zirconium in steelmaking are associated with a strong chemical affinity, in decreasing order, for oxygen, nitrogen, sulphur and carbon. Historically, the main use of additions of zirconium to steel was for combination preferentially with sulphur and so avoid the formation of manganese sulphide, known to have a deleterious influence of the impact toughness of wrought and welded steel. Modern steelmaking techniques have also raised the possibility that zirconium additions can reduce the austenite grain size and increase dispersion strengthening, due to precipitation of zirconium carbonitrides, or in high nitrogen vanadium-zirconium steels, vanadium nitride. This review gathers information on the compounds of zirconium identified in steels together with crystallographic data and solubility equations. Also brief accounts of the role of sulphides and particles in general on austenite grain size control and toughness are included.

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“…Thus, inclusions such as alumina, [53] silica, AlN, [48,72] TiN, and sulfide precipitate. Sulfides form interdendritically during solidification and often nucleate on oxides already present in the liquid steel.…”

Section: A Indigenous Inclusions In Steelmentioning

confidence: 99%

State of the art in the control of inclusions during steel ingot casting

Zhang

Thomas

2006

Metall Mater Trans B

253

129

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This article extensively reviews published research on inclusions in ingot steel and defects on ingot products, methods to measure and detect inclusions in steel, the causes of exogenous inclusions, and the transport and entrapment of inclusions during fluid flow, segregation, and solidification of steel cast in ingot molds. Exogenous inclusions in ingots originate mainly from reoxidation of the molten steel, slag entrapment, and lining erosion, which are detailed in this article. The measures to prevent the formation of exogenous inclusions and improve their removal are provided, which are very useful for the clean steel production of ingot industries.

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Aluminium nitride in steel

Cited by 59 publications

References 9 publications

Hot ductility of high Al TWIP steels containing Nb and Nb-V

Hot ductility of high Al TWIP steels containing Nb and Nb-V

Role of zirconium in microalloyed steels: A review

State of the art in the control of inclusions during steel ingot casting

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