Improvement of wear resistance of Hastelloy C-276 through laser surface melting

Hashim, M.; Babu, K.E. Sarath Raghavendra; Duraiselvam, Muthukannan; Natu, Harshad

doi:10.1016/j.matdes.2012.10.024

Cited by 69 publications

(15 citation statements)

References 15 publications

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“…Homogeneous and equiaxed recrystallized grain microstructure for Hastelloy C-276 is supposed to be beneficial for hightemperature mechanical properties and welding performance. Although many previous studies have been done on investigating the creep resistance and corrosion resistance (Ref [7][8][9], there are very limited data available about the microstructure control during manufacture. Since the microstructure undergoes essential change during manufacture, investigating the microstructural evolution and softening mechanism during hightemperature deformation is of great importance (Ref [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

The Kinetics of Metadynamic Recrystallization in a Ni-Cr-Mo-Based Superalloy Hastelloy C-276

Zhang

Shen

et al. 2016

J. of Materi Eng and Perform

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The metadynamic recrystallization (MDRX) behavior of a typical Ni-Cr-Mo-based superalloy Hastelloy C-276 was investigated using two-stage isothermal compression tests on a Gleeble thermal-mechanical simulator in the temperature range of 1050-1200°C, the strain rate range of 0.1-5.0 s 21 , the strains of 0.32, 0.45, and 0.6 at the first stage of compression, and the interval times of 0.5-30 s. The results show that the microstructure and the stress-strain relation of the studied superalloy vary during the interruption period due to the occurrence of MDRX. The MDRX softening fraction and recrystallized grain size increase rapidly with the increasing of interval time, deformation temperature, and strain rate. The effect of strain at the first stage of compression on MDRX is less pronounced. The kinetics of MDRX softening was established based on the flow stress curves, and the apparent activation energy of MDRX of Hastelloy C-276 is evaluated as 241 kJ/mol.

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Section: Introductionmentioning

confidence: 99%

The Kinetics of Metadynamic Recrystallization in a Ni-Cr-Mo-Based Superalloy Hastelloy C-276

Zhang

Shen

et al. 2016

J. of Materi Eng and Perform

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“…Two Hastelloy C-276 plates were brazed together by a nickel-based filler metal BNi-2. The chemical compositions of Hastelloy C-276 and BNi-2 are listed in Tables 1 [22] and 2 [23], respectively. The brazing components are heated to 500°C at 10°C/min and then hold about 60 min.…”

Section: Finite Element Modelmentioning

confidence: 99%

Notch effect on creep damage for Hastelloy C276-BNi2 brazing joint

et al. 2015

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“…[14][15][16][17][18][19][20] In addition, slower cooling rate associated with such conventional welding techniques also results in coarser columnar dendritic structure and acts as a favorable site for segregation of elements while solidification. 21,22) Therefore, it is essential to improve the welding process in order to obtain better microstructural and mechanical properties. A lot of research conducted in the recent past has shown the beneficial aspects of pulsed mode of GTAW over conventional GTAW process.…”

Section: Introductionmentioning

confidence: 99%

Effect of Pulsed Current Gas Tungsten Arc Process on the Dissimilar Weldments between Nickel-based Superalloy/Austenitic Stainless Steel

2017

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The present work aims at investigating the microstructural and mechanical properties of dissimilar welds between Superalloy C-276 and Grade 321 austenitic stainless steel sheets, fabricated by pulsed current gas tungsten arc welding. The microstructural examination was carried out using an optical microscope and scanning electron microscope (SEM) equipped with energy dispersive spectroscopy. The weld metal microstructures divulged finer equiaxed grains. SEM images revealed migrated grain boundaries adjacent to weld line on both Superalloy C-276 and Grade 321. In addition, the presence of Mo-rich phases was also observed in the weld metal and at the weld interface of Superalloy C-276, which needs further investigation. Mechanical tests were carried out with respect to microhardness, tensile and impact properties. Furthermore, the presence of finer dendritic structure and controlled distribution of elements obtained with PCGTAW contributed for higher corrosion resistance of WM compared to BMs. The results of the present study would help in obtaining high quality dissimilar joints. Moreover, Grade 321 being a low-priced material as compared to Superalloy C-276 would be an economical substitution and would facilitate in saving huge material costs.

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Improvement of wear resistance of Hastelloy C-276 through laser surface melting

Cited by 69 publications

References 15 publications

The Kinetics of Metadynamic Recrystallization in a Ni-Cr-Mo-Based Superalloy Hastelloy C-276

The Kinetics of Metadynamic Recrystallization in a Ni-Cr-Mo-Based Superalloy Hastelloy C-276

Notch effect on creep damage for Hastelloy C276-BNi2 brazing joint

Effect of Pulsed Current Gas Tungsten Arc Process on the Dissimilar Weldments between Nickel-based Superalloy/Austenitic Stainless Steel

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