Residual Stress Characteristics of High-Temperature Protective MCrAlY Coating.

Itoh, Yoshiyasu; Saitoh, Masahiro; Miyazaki, Matsuo

doi:10.1299/kikaia.60.141

Cited by 4 publications

(2 citation statements)

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“…Ito et al reported the existence of a relationship between the residual stress of the film and its Young's modulus. 42) In other words, the residual stress of the multilayered DLC film decreases as does Young's modulus of the film when the number of layers increases. 24,25,36,42) H/E, H 3 /E 2 , and H 2 /E, expressed based on hardness and Young's modulus, were all higher for the 4-layer DLC film.…”

Section: Mechanical Properties Of Dlc Filmmentioning

confidence: 99%

“…42) In other words, the residual stress of the multilayered DLC film decreases as does Young's modulus of the film when the number of layers increases. 24,25,36,42) H/E, H 3 /E 2 , and H 2 /E, expressed based on hardness and Young's modulus, were all higher for the 4-layer DLC film. It is predicted that the 4-layer DLC film is superior to the 2-layer DLC film in terms of both the wear resistance and durability.…”

Section: Mechanical Properties Of Dlc Filmmentioning

confidence: 99%

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Improvement of Surface Properties of Aluminum Alloy-Based Composites by Multi-Layer DLC Coating

Fuyama¹,

Okada

Nagaoka³

et al. 2022

Mater. Trans.

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In recent years, it has been a challenge for the transportation sector to reduce the weight of vehicles for higher fuel efficiency. This expands the use of light metals such as Al alloys. However, these materials have low hardness and surface strength. In this study, Al-alloy (AC8A; AlSi CuNiMg) composites reinforced with Al 2 O 3 fibers were used as base materials and were coated with multilayer diamond-like carbon (DLC) films to improve their properties. The multilayer DLC films were deposited on the Al alloy composites by radio frequency plasma-enhanced chemical vapor deposition (RF-PECVD) using methane and acetylene gases as the raw materials. As the number of DLC film layers increased, the Young's modulus of the samples decreased and the following ratios of hardness (H ) to elastic modulus (E) also increased: H/E, H 3 /E 2 , H 2 /E. In addition, the critical number of peeling slides increased as the composite volume fraction and the number of layers increased.

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Section: Mechanical Properties Of Dlc Filmmentioning

confidence: 99%

Section: Mechanical Properties Of Dlc Filmmentioning

confidence: 99%

Improvement of Surface Properties of Aluminum Alloy-Based Composites by Multi-Layer DLC Coating

Fuyama¹,

Okada

Nagaoka³

et al. 2022

Mater. Trans.

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Effect of Corrosion-Resistant Coatings on Fatigue Properties of Gas Turbine Blade Materials

Kagawa

Negishi²

2009

Trans.JSME, Ser.A

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Isotherma］low − cycle fatigue tests and thermal − mechallical fatigue tests with linear ollt elphase cyclcs wcrc carried 〔〕ut Llsing cylindrical specimens made of Ni base superalloy and coated 、 vith several kinds 〔｝ f c 〔〕 rrosion re ＄亙 stan し coatings ． Irl some tests， fatigue luading was iIlterr し ipted severaI times and coating cracks were obserlved by lneans 〔｝f replica technique 、 As a resu ］ t ， threc typcs of coating cracks were observed ， namely ， rnultipie parallel l 〔)ng cracks ， muitiple parallel sh 〔， rt cracks and lloll − paral ［ el cracks 、 Pvlultiple parallel ユ orlg cracks are caused from ユ ack of ductility of coa 亡［ ng rnaterials ． This し｝pe of coating cracks l項 tiate in un eurly stuge of fatigue l 〔〕ading and has a strung effcct to reduce fatigue Iife ． Mul し iple para1lel short cracks are caused by fatigue〔〕f coating layer 、 These cracks propagate into the substrate bcfore cracks initiate in the substrute ar ユ d reduce fatigue ユ ife 〔＞ f the coated specimen ． No 冂一 parallel coating crac1 くs arc causcd by pr 研〕agation c〕f cracks initiated in the substrate and have litt 且 e effect to reduce fatigue Iife，

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Effect of Thermal Barrier Coating Layer on HIP Treated IN738LC Fatigue Characteristic

Kuba

Kojima²,

Suzuki

2006

KEM

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The fatigue characteristic of thermal barrier-coated Ni-base superalloy IN738LC at room temperature was studied by fatigue test using SEM-servo testing machine. In order to eliminate the influence of micro-shrinkage in IN738LC and purely investigate the effect of TBC on fatigue characteristic, HIP treated IN738LC was used in comparison with NON-HIP treated one. The results indicate that HIP treatment is effective to remove micro-shrinkage and fatigue life is greatly improved. The TBC coating layer is a strength member in the small test specimen at room temperature, and TBC coated material showed lower fatigue life rather than IN738LC without TBC.

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Residual Stress Characteristics of High-Temperature Protective MCrAlY Coating.

Cited by 4 publications

References 0 publications

Improvement of Surface Properties of Aluminum Alloy-Based Composites by Multi-Layer DLC Coating

Improvement of Surface Properties of Aluminum Alloy-Based Composites by Multi-Layer DLC Coating

Effect of Corrosion-Resistant Coatings on Fatigue Properties of Gas Turbine Blade Materials

Effect of Thermal Barrier Coating Layer on HIP Treated IN738LC Fatigue Characteristic

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