Characterization of Different Surface States and Its Effects on the Oxidation Behaviours of Alloy 690TT

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	Characterization of Different Surface States and Its Effects on the Oxidation Behaviours of Alloy 690TT
	Z. M. Zhang; J. Q. Wang; E. H. Han; W. Ke
	2012
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	28 期号:4 页码:353-361
摘要	Alloy 690TT samples with four kinds of surface states were prepared: 1) ground to 400 grit; 2) ground to 1500 grit; 3) mechanically polished (MP) and 4) electro-polished (EP). The surface morphologies and the surface skin layers' microstructures of these samples were characterized systematically using various methods and the effects of surface states on the oxidation behaviours of Alloy 690TT were also discussed. The results showed that surface roughness and micro-hardness decreased gradually from the ground to EP surfaces. The grains in the near-surface layers of the ground and MP surfaces had been refined and the residual strains were also very high. The dislocations on the ground surfaces were mainly parallel dislocation lines. The thickness of the superficial cold-worked layers decreased gradually from the ground surfaces to polished surfaces. The oxide morphologies and oxidation rate depended greatly on the surface states of samples. Cold-working by grinding treatments could benefit the outward diffusion of metallic atoms and the nucleation of surface oxides and then accelerate the growth of surface oxide films.
部门归属	[zhang, zhiming; wang, jianqiu; han, en-hou; ke, wei] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;wang, jq (reprint author), chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;wangjianqiu@imr.ac.cn
关键词	Alloy 690tt Surface States Cold-worked Layer Microstrain Grain Refinement Stress-corrosion Cracking High-temperature Water Environmentally Assisted Cracking Steam Initiation Steels Strain
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60478
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. M. Zhang,J. Q. Wang,E. H. Han,et al. Characterization of Different Surface States and Its Effects on the Oxidation Behaviours of Alloy 690TT[J]. Journal of Materials Science & Technology,2012,28(4):353-361.
APA	Z. M. Zhang,J. Q. Wang,E. H. Han,&W. Ke.(2012).Characterization of Different Surface States and Its Effects on the Oxidation Behaviours of Alloy 690TT.Journal of Materials Science & Technology,28(4),353-361.
MLA	Z. M. Zhang,et al."Characterization of Different Surface States and Its Effects on the Oxidation Behaviours of Alloy 690TT".Journal of Materials Science & Technology 28.4(2012):353-361.