Characteristics of thin surface layers of cobalt-based alloys deposited by laser cladding

Lin, Wei-Hsun; Chen, C.

doi:10.1016/j.surfcoat.2005.03.033

Cited by 110 publications

(44 citation statements)

References 16 publications

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“…Due to uniform application of cooling rate, the distribution of alloying elements is homogenous in sample. The dilution of stellite by iron causes increased toughness, reduced hardness and corrosion resistance in many corrosive environments [18,19]. It also causes reduced wear resistance because of increase in cobalt lattice stacking fault energy [20].…”

Section: Resultsmentioning

confidence: 99%

Microstructure and wear behavior of stellite 6 cladding on 17-4 PH stainless steel

Gholipour

Shamanian

Ashrafizadeh

2011

Journal of Alloys and Compounds

137

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Section: Resultsmentioning

confidence: 99%

Microstructure and wear behavior of stellite 6 cladding on 17-4 PH stainless steel

Gholipour

Shamanian

Ashrafizadeh

2011

Journal of Alloys and Compounds

137

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“…Much attention has been paid to the wear resistance of Tribaloy alloys [2,7,8]. However, relatively few reports on the reaction mechanisms of T-800 oxidized at high temperatures are available.…”

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior of Tribaloy T-800 Alloy at 800 and 1,000 °C

et al. 2008

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The oxidation behavior of Co-based Tribaloy T-800 alloy has been studied isothermally in air at 800 and 1,000°C, respectively. The results showed that the oxidation mechanism was dependent on the exposure temperature. The oxidation of the alloy followed subparabolic oxidation kinetics at 800°C. The oxide scale at this temperature exhibited a multi-layered structure including an outer layer of Co oxide, a layer composed of complex oxide and spinel, a nonuniform Mo-rich oxide layer, an intermediate mixed oxides layer and an internal attacked layer with different protrusions into Laves phase. During 1,000°C exposure, it followed linear kinetics. The oxidation rendered a relatively uniform external Cr-rich oxide layer coupled with a thin layer of spinel on the top surface and voids at local scale/alloy interface and intergranular region together with internal Si oxide at 1,000°C.

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“…Williamson-Hall equation was employed to estimate the grain size of the deposited films. Preferred orientation was investigated using the relative texture coefficient (RTC hkl ), which is given by the following expression (Ref [32][33][34][35]:…”

Section: Characterization Of the Co-p Coatingsmentioning

confidence: 99%

Effect of pH, Surfactant, and Heat Treatment on Morphology, Structure, and Hardness of Electrodeposited Co-P Coatings

Zeinali-Rad

Allahkaram

Mahdavi

2015

J. of Materi Eng and Perform

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Nano-crystalline and amorphous Co-P coatings were deposited on plain carbon steel substrates by using direct current. Effects of electrolyte pH on morphology, current efficiency, phosphorus content, hardness, and preferred orientation of the nano-crystalline coatings were investigated. Moreover, the effects of heat treatment on microstructure and hardness of the nano-crystalline and the amorphous coatings were studied. The results showed that, phosphorus content and hardness of the nano-crystalline coatings were decreased by increasing of the pH, in spite of a current efficiency enhancement to as much as 98%. Grain size and preferred orientation were also changed from 13 to 31 nm and from mostly [002] to [100] by increasing the pH from 1 to 4, respectively. Smoother coatings and higher current efficiencies were obtained by the addition of 1 g/L sodium dodecyl sulfate (SDS) to the bath. Highest hardness of the nano-crystalline and the amorphous coatings was about 600 and 750 HV, which increased and reached 760 and 1090 HV after heat treatment, respectively.

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Characteristics of thin surface layers of cobalt-based alloys deposited by laser cladding

Cited by 110 publications

References 16 publications

Microstructure and wear behavior of stellite 6 cladding on 17-4 PH stainless steel

Microstructure and wear behavior of stellite 6 cladding on 17-4 PH stainless steel

Oxidation Behavior of Tribaloy T-800 Alloy at 800 and 1,000 °C

Effect of pH, Surfactant, and Heat Treatment on Morphology, Structure, and Hardness of Electrodeposited Co-P Coatings

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