Ion implantation induced saturation stress decrease of body-centred cubic polycrystalline alpha-Fe by Ag+, Cr+, Y+ and A1(+) in cyclic deformation

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	Ion implantation induced saturation stress decrease of body-centred cubic polycrystalline alpha-Fe by Ag+, Cr+, Y+ and A1(+) in cyclic deformation
	H. W. Wang; D. Z. Yang; W. D. Shi; S. Patu
	1996
发表期刊	Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms
ISSN	0168-583X
卷号	108 期号:4 页码:371-376
摘要	Plastic strain range (3 x 10(-3)-1.2 x 10(-2)) controlled low cycle fatigue (LCF) tests have been performed using an annealed polycrystalline alpha-Fe with and without metallic ion implantations. Ag+, Cr+, Y+, and Al+ ion implantation was carried out at an energy range of 90-120 keV and a dose of 5 X 10(16) ions/cm(2). It was found that the fatigue resistance of alpha-Fe was increased, and the fatigue crack initiation (FCI) life extended by implantation. The cyclic stress-strain (CSS) plots revealed that the as-implanted specimens experienced a cyclic softening (saturation stress decrease) compared with the unimplanted specimens. Surface plastic strain homogenisations were observed for the implanted specimens. An implantation induced enhancement of screw dislocation annihilations by cross slip instead of causing the formation of a kink pairs mechanism was proposed to correlate the strain homogenisation with the relative cyclic softening, and thus to explain the improved LCF property of alpha-Fe by implantation.
部门归属	dalian univ technol,state key lab mat modificat beams 3,dalian 116024,peoples r china. acad sinica,inst met res,state key lab fatigue & fracture mat,shenyang 110015,peoples r china.;wang, hw (reprint author), univ manchester,inst sci & technol,ctr corros & protect,pob 88,manchester m60 1qd,lancs,england
关键词	Fatigue Crack Initiation Nickel Behavior Copper Metals
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38421
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. W. Wang,D. Z. Yang,W. D. Shi,et al. Ion implantation induced saturation stress decrease of body-centred cubic polycrystalline alpha-Fe by Ag+, Cr+, Y+ and A1(+) in cyclic deformation[J]. Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms,1996,108(4):371-376.
APA	H. W. Wang,D. Z. Yang,W. D. Shi,&S. Patu.(1996).Ion implantation induced saturation stress decrease of body-centred cubic polycrystalline alpha-Fe by Ag+, Cr+, Y+ and A1(+) in cyclic deformation.Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms,108(4),371-376.
MLA	H. W. Wang,et al."Ion implantation induced saturation stress decrease of body-centred cubic polycrystalline alpha-Fe by Ag+, Cr+, Y+ and A1(+) in cyclic deformation".Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 108.4(1996):371-376.