High-cycle and very-high-cycle fatigue behaviour of a titanium alloy with equiaxed microstructure under different mean stresses
文献类型：期刊论文
| 作者 | Pan XN(潘向南); Hong YS(洪友士)
|
| 刊名 | FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
 |
| 出版日期 | 2019-09-01 |
| 卷号 | 42期号:9页码:1950-1964 |
| 关键词 | fatigue crack initiation mean stress stress ratio titanium alloy very-high-cycle fatigue |
| ISSN号 | 8756-758X |
| DOI | 10.1111/ffe.13050 |
| 通讯作者 | Hong, Youshi(hongys@imech.ac.cn) |
| 英文摘要 | The fatigue behaviour of a titanium alloy Ti-6Al-4V with equiaxed microstructure (EM) under different values of tensile mean stress or stress ratio (R) was investigated from high-cycle fatigue (HCF) to very-high-cycle fatigue (VHCF) regimes via ultrasonic axial cycling. The effect of mean stress or R on the fatigue strength of HCF and VHCF was addressed by Goodman, Gerber, and Authors' formula. Three types of crack initiation, namely, surface-with-RA (rough area), surface-without-RA, and interior-with-RA, were classified. The maximum value of stress intensity factor (SIF) at RA boundary for R R in HCF and VHCF regimes. The SIF range at RA boundary for R > 0 also keeps constant regardless of R in VHCF regime, but this value decreases linearly with the increase of R for surface RA cases. The microstructure observation at RA regions gives a new result of nanograin formation only in the cases of negative stress ratios for the titanium alloy with EM, which is explained by the mechanism of numerous cyclic pressing. |
| 分类号 | 二类 |
| WOS关键词 | CRACK INITIATION CHARACTERISTICS ; EARLY GROWTH ; FORMATION MECHANISM ; GIGACYCLE FATIGUE ; LIFE DIAGRAMS ; TI-6AL-4V ; STRENGTH ; RATIO ; CONSTANT ; REGION |
| WOS研究方向 | Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000479081900008 |
| 其他责任者 | Hong, Youshi |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/79748]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Pan XN,Hong YS. High-cycle and very-high-cycle fatigue behaviour of a titanium alloy with equiaxed microstructure under different mean stresses[J]. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,2019,42(9):1950-1964. |
| APA | 潘向南,&洪友士.(2019).High-cycle and very-high-cycle fatigue behaviour of a titanium alloy with equiaxed microstructure under different mean stresses.FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,42(9),1950-1964. |
| MLA | 潘向南,et al."High-cycle and very-high-cycle fatigue behaviour of a titanium alloy with equiaxed microstructure under different mean stresses".FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES 42.9(2019):1950-1964. |
入库方式： OAI收割
来源：力学研究所
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