Acta Metall Sin  1990, Vol. 26 Issue (2): 46-51    DOI:

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PRECIPITATION IN BINARY Al-Li ALLOYS

YAO Daping;HU Zhuangqi;ZHANG Yun;SHI Changxu Institute of Metal Research; Academia Sinica; Shenyang Institute of Metal Research;Academia Sinica;Shenyang 110015

YAO Daping;HU Zhuangqi;ZHANG Yun;SHI Changxu Institute of Metal Research; Academia Sinica; Shenyang Institute of Metal Research;Academia Sinica;Shenyang 110015. PRECIPITATION IN BINARY Al-Li ALLOYS. Acta Metall Sin, 1990, 26(2): 46-51.

Abstract References Related Articles Recommended Metrics Download:  PDF(1066KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Studies were carried out of the precipitation in two sets of binaryAl-Li alloys by means of hardness test, DSC analysis and TEM observation. Whent healloys were aged for constant time, a peak appeared on the plot of temperaturedependence upon their hardness in the range of low temperature, and the endother-mic dissolution peak was quite distinct on the DSC curve also at low temperature.These are believed that an li-rich GP zone is formed in the alloys aged at lowtemperature, but no more GP zone if aging at elevated temperature. The hardnessof the alloys raises rapidly with coarsening of δ'-phase grains. The two endother-mic peaks of δ' dissolution on the DSC curve are related to the structural adjust-ment at twice of the δ' precipitation. The equilibrium δ-phase, being of higherthermal stability, nucleates and grows directly from the supersaturated solidsolution with the aid of the grain boundary. Key words:  binary Al-Li alloy      precipitation      dissolution      endothermic peak      aging      Received:  18 February 1990      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/Y1990/V26/I2/46 1 Silcock J M. J Inst Met, 1959--60; 88: 357 2 Nozato R, Nakai G. Trans Jpn Inst Met, 1977; 18: 679 3 Papazian J M, Sigli C, Sanchez J M. Scr Metall. 1986; 20: 201 4 Balmuth E S. Scr Metall, 1984; 18: 301 5 Mukhopadhyay A K, Tite C N J, Flower H M, Gregson P J, Sale F. In: Champier G. Dubost B, Miannay D, Sabetay L eds., Aluminum-Lithium Alloys IV, J Phys (Paris) Colloque, 1987; 3: C3--439 6 Yao Daping, Hu Zhuangqi, Li Yiyi, Zhang Yun, Shi Changxu. Chin J Me. Sci Technol, to be published 7 Baumann S F, Williams D B. Acta Metall, 1985; 33: 1069 8 高桥恒夫,里逹雄,轻金属,1986;36(4) ;207 9 Yao D P, Zhang Y, Hu Z Q, Li Y Y, Shi C X. Scr Metall, 1989; 23: 537Z [1] ZHANG Leilei, CHEN Jingyang, TANG Xin, XIAO Chengbo, ZHANG Mingjun, YANG Qing. Evolution of Microstructures and Mechanical Properties of K439B Superalloy During Long-Term Aging at 800oC[J]. 金属学报, 2023, 59(9): 1253-1264. [2] LIANG Kai, YAO Zhihao, XIE Xishan, YAO Kaijun, DONG Jianxin. Correlation Between Microstructure and Properties of New Heat-Resistant Alloy SP2215[J]. 金属学报, 2023, 59(6): 797-811. [3] WANG Changsheng, FU Huadong, ZHANG Hongtao, XIE Jianxin. Effect of Cold-Rolling Deformation on Microstructure, Properties, and Precipitation Behavior of High-Performance Cu-Ni-Si Alloys[J]. 金属学报, 2023, 59(5): 585-598. [4] WANG Bin, NIU Mengchao, WANG Wei, JIANG Tao, LUAN Junhua, YANG Ke. Microstructure and Strength-Toughness of a Cu-Contained Maraging Stainless Steel[J]. 金属学报, 2023, 59(5): 636-646. 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