Acta Metall Sin  1993, Vol. 29 Issue (1): 33-38    DOI:

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FATIGUE PROPERTIES OF AN Al-Li ALLOY

AI Suhua;WANG Zhongguang;ZHANG Yun;HU Zhuangqi State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; Academia Sinica; Shenyang

AI Suhua;WANG Zhongguang;ZHANG Yun;HU Zhuangqi State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; Academia Sinica; Shenyang. FATIGUE PROPERTIES OF AN Al-Li ALLOY. Acta Metall Sin, 1993, 29(1): 33-38.

Abstract References Related Articles Recommended Metrics Download:  PDF(1861KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The room temperature fatigue life of smooth specimens for alloy 8090 hasbeen investigated in natural ageing and artificial ageing conditions. The high temperature fa-tigue properties were also studied at 100--200℃. A parallel study was also made on tradi-tional Al alloys LC4 (artificial ageing) and LY12(natural aging)for comparison. The results showed that the artificially aged state resulted in an increase in fatigue life incomparison with the naturally aged state. As compared with the traditional high strength al-loys LC4 and LY12 both the artificially aged and naturally aged states caused a significantenhancement in fatigue life. The fatigue life reduced markedly with increasing temperature forartificially aged alloy 8090. Though high temperarure fatigue life decreased a little for natural-ly aged alloys 8090 and LY12, there was increasing during 200℃ and 150℃, respectively. The observation of fracture surface demonstrated the fatigue cracks in alloy 8090 mainlyinitiated from the metallurgical defects on surfaces and subsurfaces. It also showed that thecharacter of laminated fracture was more obvious in alloy 8090 than in tranditional alumini-um. Key words:  Al-Li alloy      alloy 8090      fatigue property      Received:  18 January 1993      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1993/V29/I1/33 1 Sanders T H Jr., Starke E A Jr. Acta Metall, 1982; 30: 927 2 Gregson P J, Flower H M. Acta Metall, 1985; 33: 527 3 Flower H M, Gregson P J. Mater Sci Technol, 1987; 3: 81 4 Xu Y B, Wang Z G, Zhang Y, Zhao H H, Hu Z Q. Metall Trans. 1991; 22A: 723 5 刘玉林,张匀,赵洪恩,胡壮麒,师昌绪.金属学报,1991;27:A337 6 张匀.内部资料,1991G [1] SU Kaixin, ZHANG Jiwang, ZHANG Yanbin, YAN Tao, LI Hang, JI Dongdong. High-Cycle Fatigue Properties and Residual Stress Relaxation Mechanism of Micro-Arc Oxidation 6082-T6 Aluminum Alloy[J]. 金属学报, 2022, 58(3): 334-344. [2] WANG Shuo, WANG Junsheng. Structural Evolution and Stability of the δ′/θ′/δ′ Composite Precipitate in Al-Li Alloys: A First-Principles Study[J]. 金属学报, 2022, 58(10): 1325-1333. [3] LI Shiju, LI Yang, CHEN Jianqiang, LI Zhonghao, XU Guangming, LI Yong, WANG Zhaodong, WANG Guodong. Segregation Behavior, Microstructure and Properties of 2099Al-Li Alloy Produced by Twin-Roll Casting Underthe Action of Electromagnetic Oscillation Field[J]. 金属学报, 2020, 56(6): 831-839. [4] XU Wei,HUANG Minghao,WANG Jinliang,SHEN Chunguang,ZHANG Tianyu,WANG Chenchong. Review: Relations Between Metastable Austenite and Fatigue Behavior of Steels[J]. 金属学报, 2020, 56(4): 459-475. 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