Effects of Stress Ratio on the Fatigue Crack Growth Rate Under Steady State of Selective Laser Melted TC4 Alloy with Defects
文献类型：期刊论文
| 作者 | Qi Zhao1,2; Wang Bin2; Zhang Peng2; Liu Rui2; Zhang Zhenjun2; Zhang Zhefeng2 |
| 刊名 | ACTA METALLURGICA SINICA
 |
| 出版日期 | 2023-10-11 |
| 卷号 | 59期号:10页码:1411-1418 |
| 关键词 | selective laser melting TC4 alloy defect stress ratio fatigue crack growth rate Paris formula |
| ISSN号 | 0412-1961 |
| DOI | 10.11900/0412.1961.2022.00154 |
| 通讯作者 | Zhang Peng(pengzhang@imr.ac.cn) ; Zhang Zhefeng(zhfzhang@imr.ac.cn) |
| 英文摘要 | TC4 alloy components with complicated geometries can be directly fabricated using selective laser melting (SLM) at a low cost. These components are often used under complex service conditions. Thus, it is important to investigate the effects of the stress ratio (R) on the fatigue crack growth (FCG) rate (da / dN) in SLM TC4 alloys with defects at the steady state to develop guidelines for damage-tolerance design and fatigue life assessment. In this work, SLM TC4 alloys containing two different microdefects were used to qualitatively examine the effect of the defect size on the da / dN at the steady state. In addition, comparative studies using an alloy with smaller defect sizes were performed at the steady state and at R = 0.1, 0.3, and 0.5. The relationship between the da / dN and stress intensity factor range (Delta K) was plotted and analyzed by fitting the Paris formula. The results show that the Paris formula parameter, m, is constant and the parameter, C, increases, which means that the increase in the defect size increases the da / dN. The da / dN increases with an increase in R, and the da / dN curves converge at low Delta K, which are reflected in the increase in the parameter, m, and the decrease in the parameter C. Additionally, there is a linear relationship between m and lgC (the common logarithm of C), which is not affected by R. Finally, the change patterns in the da / dN caused by the microdefects and R were analyzed along with the fatigue damage mechanisms. |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001087007200012 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.imr.ac.cn/handle/321006/177936]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhang Peng; Zhang Zhefeng |
| 作者单位 | 1.Zhengzhou Univ, Henan Inst Adv Technol, Zhengzhou 450001, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qi Zhao,Wang Bin,Zhang Peng,et al. Effects of Stress Ratio on the Fatigue Crack Growth Rate Under Steady State of Selective Laser Melted TC4 Alloy with Defects[J]. ACTA METALLURGICA SINICA,2023,59(10):1411-1418. |
| APA | Qi Zhao,Wang Bin,Zhang Peng,Liu Rui,Zhang Zhenjun,&Zhang Zhefeng.(2023).Effects of Stress Ratio on the Fatigue Crack Growth Rate Under Steady State of Selective Laser Melted TC4 Alloy with Defects.ACTA METALLURGICA SINICA,59(10),1411-1418. |
| MLA | Qi Zhao,et al."Effects of Stress Ratio on the Fatigue Crack Growth Rate Under Steady State of Selective Laser Melted TC4 Alloy with Defects".ACTA METALLURGICA SINICA 59.10(2023):1411-1418. |
入库方式： OAI收割
来源：金属研究所
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