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| AN INVESTIGATION OF THE GROWTH PROCESS OF MODULATED STRUCTURE IN A NiFeNbAl ALLOY |
| Xu Wenchong;Wang Junjian;Su Xiujin;Li Zhihua Central Iron and Steel Research Institute; Ministry of Metallurgical Industry |
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Cite this article:
Xu Wenchong;Wang Junjian;Su Xiujin;Li Zhihua Central Iron and Steel Research Institute; Ministry of Metallurgical Industry. AN INVESTIGATION OF THE GROWTH PROCESS OF MODULATED STRUCTURE IN A NiFeNbAl ALLOY. Acta Metall Sin, 1979, 15(4): 482-586.
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Abstract The formation and growth process of modulated structure in a NiFeNbAlalloy during aging have been investigated by means of TEM, X-ray diffraction andhardness measurements. The presence of Al in the alloy appears to accelerate thegrowth process of the structure. At an early stage of aging, the pre-precipitatesof γ′[Ni_3(Al,Nb)] phase in the alloy has been found to arrange in line along thethree <100> directions; and a micrograph showing parallel striations has also beenobtained under [001] and [011] zones of the electron diffraction. At this stagethe spacing of the striations was about 100A. When the aging period was pro-longed a "tweed structure" appeared. Further increase of aging time widened thespacing of parallel striations to about 200A. With 10h-aging at 550, 700 or 800℃,γ′ particles were observed at the striations of the modulated structure in the alloyand appeared to be in perfect arrangement along [100] and [010] directions. X-raydiffraction of the alloy showed that there is a side-band on the (220) main peakunder various aging conditions. Attempts have also been made to clarify the natureof hardening of the alloy during aging as well as to explain the higher hardnessin NiFeNbAl alloy than in NiFeNb alloy.
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Received: 18 April 1979
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[1] 戴礼智,王俊健,侯德惠,物理学报,27(1978) ,260．
[2] 徐温崇,王俊健,苏绣锦,李志华,金属学报,15(1979) ,252．
[3] 郭可信,X射线学及电子显微术的进展,全国第二届金属物理学术会议论文集编辑委员会编,上海科学技术出版社,1966年,p.27．
[4] Toru Miyazaki, Tamio Shinozawa, Hiroshi Murayama and Hirotaro Mori, Trans. Jap. Inst. Metals, 17 (1976) , No. 1, 181．
[5] Ardell, A. J. and Nicholson, R. B., Acta Met., 14 (1966) , 1295．
[6] Quist, W. E., Taggart, R. and Polonis, D. H., Met. Trans., 2 (1971) , 825．t |
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