High temperature oxidation behavior of IN738LC alloy formed by selective laser melting

doi:10.1007/s10853-022-07345-y

	High temperature oxidation behavior of IN738LC alloy formed by selective laser melting
	Hu, Yong 1,3; Zhang, Hui-Ying 1,3; Kang, Wen-Jiang 2,3; Chu, Cheng 1,3; Hu, Yong-Qi 1,3; Zhang, Hao 1,3; Zhang, Dong 4
刊名	JOURNAL OF MATERIALS SCIENCE
	2022-06-01
卷号	57 期号:25 页码:11983-11996
关键词	AluminaAluminum oxideChromium compoundsGrain boundariesMeltingMorphologyOxide filmsRate constantsScanning electron microscopyThermooxidationTitanium dioxide Composition layersHigh temperature oxidation BehaviorIsothermal oxidationsLayer morphologyOptical-Oxidation productsOxide layerSelective laser meltingTemperature conditionsX- ray diffractions
ISSN号	0022-2461
DOI	10.1007/s10853-022-07345-y
英文摘要	The high temperature oxidation behavior of selective laser melting processed IN738LC alloy at different temperatures was studied using isothermal oxidation testing. The phase composition and oxide layer morphology of the oxidation products under various temperature conditions were characterized by X-ray diffraction (XRD), optical microscopy (OM), and scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), and the oxidation mechanism was discussed. The results reveal that the oxidation kinetic curves of the deposited samples at 900 and 1000 degrees C show parabolic law, and the oxidation rate constants k(p) are 2.54 x 10(-4) and 7.68 x 10(-4)mg(2)/cm(4)center dot h, respectively, where the oxidation products at different temperatures are composed of Al2O3, Cr2O3, and TiO2, which meet the complete oxidation resistance level. Element Cr preferentially oxidizes to produce Cr2O3 during the initial oxidation, Ti atoms at the interface extend the diffusion to the surface of the sample through the Cr2O3 layer to produce TiO2, while the Al atoms rapidly diffuse along the fine columnar grain boundaries toward the oxide-metal interface and finally form a dense Al2O3 layer. The holes formed under the oxide film at 1000 degrees C will reduce the adhesion between the oxide layer and the substrate, meanwhile adversely affecting the oxidation resistance of the sample.
WOS研究方向	Materials Science
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000809533500004
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158917]
专题	材料科学与工程学院
作者单位	1.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China; 2.Chem & Chem Engn Guangdong Lab, Shantou 515031, Guangdong, Peoples R China 3.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Langongping Rd 287, Lanzhou 730050, Gansu, Peoples R China; 4.Jinchuan Grp Co Ltd, State Key Lab Nickel & Cobalt Resources Comprehen, Jinchang 737100, Gansu, Peoples R China;
推荐引用方式 GB/T 7714	Hu, Yong,Zhang, Hui-Ying,Kang, Wen-Jiang,et al. High temperature oxidation behavior of IN738LC alloy formed by selective laser melting[J]. JOURNAL OF MATERIALS SCIENCE,2022,57(25):11983-11996.
APA	Hu, Yong.,Zhang, Hui-Ying.,Kang, Wen-Jiang.,Chu, Cheng.,Hu, Yong-Qi.,...&Zhang, Dong.(2022).High temperature oxidation behavior of IN738LC alloy formed by selective laser melting.JOURNAL OF MATERIALS SCIENCE,57(25),11983-11996.
MLA	Hu, Yong,et al."High temperature oxidation behavior of IN738LC alloy formed by selective laser melting".JOURNAL OF MATERIALS SCIENCE 57.25(2022):11983-11996.