. Experimental procedure
The materials used in this study was directionally solidified nickel-based superalloy
DZ483. The chemical composition of the DZ483 alloy was Ni–12.29Cr–9.0Co–
3.76W–1.99Mo–3.44Al–4.01Ti–4.91Ta–0.08C–0.015B (wt.%). The ingot was cut into
round bars with diameter of 16 mm and length of 70 mm. The samples were
homogenized at 1204 C for 1 h, then heated up to 1265 C, and hold for 1 h for
solution treatment followed by air cooling. The samples were homogenized in order
to make low-melting point element dissolve into the matrix, which would decrease
the solute segregation during the dendritic growth. This could improve the initial
melting temperature and thereby increase solution treatment temperature. Afterwards,
the samples were aged at 1080 C for 4 h with and without a 12 T magnetic
field by furnace cooling. The longitudinal direction of the sample was set parallel to
the direction of the magnetic field. After the magnetic heat treatment, the high temperature
tensile tests of the samples with a gauge length of 25 mm and diameter of
5 mm were performed. The tensile tests were conducted at 950 C using tensile
testing machine (DNS100) at a strain rate of 1 mm/min. The tensile values were
measured repeatedly for five samples which were obtained in the same conditions.
The micro-hardness of the samples were measured using micro-hardness tester
(MH-3) and the average value was calculated from six indentations.
http://dx.doi.org/10.1016/j.jallcom.2015.01.016
0925-8388/ 2015 Elsevier B.V. All rights reserved.
⇑ Corresponding author. Fax: +86 021 5633 1102.
E-mail address: renzm2201@163.com (Z. Ren).
Journal of Alloys and Compounds 631 (2015) 86–89
Contents lists available at ScienceDirect
Journal of Alloys and Compounds
journal homepage: www.elsevier.com/locate/jalcom
All samples were mechanically polished and electrolytically etched with an
electrolyte consisting of 5% nitric acid, 10% acetic acid and 85% distilled water.
The microstructure and fracture surface after the tensile tests were examined with
optical microscopy (OM) and scanning electron microscopy (SEM)
. Experimental procedureThe materials used in this study was directionally solidified nickel-based superalloyDZ483. The chemical composition of the DZ483 alloy was Ni–12.29Cr–9.0Co–3.76W–1.99Mo–3.44Al–4.01Ti–4.91Ta–0.08C–0.015B (wt.%). The ingot was cut intoround bars with diameter of 16 mm and length of 70 mm. The samples werehomogenized at 1204 C for 1 h, then heated up to 1265 C, and hold for 1 h forsolution treatment followed by air cooling. The samples were homogenized in orderto make low-melting point element dissolve into the matrix, which would decreasethe solute segregation during the dendritic growth. This could improve the initialmelting temperature and thereby increase solution treatment temperature. Afterwards,the samples were aged at 1080 C for 4 h with and without a 12 T magneticfield by furnace cooling. The longitudinal direction of the sample was set parallel tothe direction of the magnetic field. After the magnetic heat treatment, the high temperaturetensile tests of the samples with a gauge length of 25 mm and diameter of5 mm were performed. The tensile tests were conducted at 950 C using tensiletesting machine (DNS100) at a strain rate of 1 mm/min. The tensile values weremeasured repeatedly for five samples which were obtained in the same conditions.The micro-hardness of the samples were measured using micro-hardness tester(MH-3) and the average value was calculated from six indentations.http://dx.doi.org/10.1016/j.jallcom.2015.01.0160925-8388/ 2015 Elsevier B.V. All rights reserved.⇑ Corresponding author. Fax: +86 021 5633 1102.E-mail address: renzm2201@163.com (Z. Ren).Journal of Alloys and Compounds 631 (2015) 86–89Contents lists available at ScienceDirectJournal of Alloys and Compoundsjournal homepage: www.elsevier.com/locate/jalcomAll samples were mechanically polished and electrolytically etched with anelectrolyte consisting of 5% nitric acid, 10% acetic acid and 85% distilled water.The microstructure and fracture surface after the tensile tests were examined withoptical microscopy (OM) and scanning electron microscopy (SEM)
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