Acta Metall Sin  1992, Vol. 28 Issue (10): 29-35    DOI:

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EMBRITTLEMENT OF Fe-Cr-Al ALLOYS AND EFFECT OF YTTRIUM ADDITION

LI Bei; WU Shuangxia; LI Dianchen (Baotou Research Institute of Rare Earth; Ministry of Metallurgical Industry); MA Ruzhang (University of Science and Technology Beijing)

LI Bei; WU Shuangxia; LI Dianchen (Baotou Research Institute of Rare Earth; Ministry of Metallurgical Industry); MA Ruzhang (University of Science and Technology Beijing). EMBRITTLEMENT OF Fe-Cr-Al ALLOYS AND EFFECT OF YTTRIUM ADDITION. Acta Metall Sin, 1992, 28(10): 29-35.

Abstract References Related Articles Recommended Metrics Download:  PDF(1084KB)  Export:  BibTeX | EndNote (RIS)       Abstract  A high temperature embrittlement occures in Fe-15Cr-4Al and Fe-20Cr-41Al alloys treated over 1000℃. It is caused mainly by 475℃ brittleness during cooling. When a secondary treatment at 500℃ was conducted, the 475℃ brittleness developed very rapidly. After only 15 min of the treating, little plasticity was remained for all samples pretreated at the temperatures over 1000℃ and cooled in water. However, no 475℃ brittleness was generated when pretreating temperature was below 1000℃ . Addition of Yttrium can inhibit not only grain growth, but also 475℃ brittleness. For the alloys with 0.2 —0.4wt-%Y, after treating at 800—1300℃, the plasticity did not decrease and the properties of furnace cooled samples were not lower than those of water cooled samples. Key words:  Fe-Cr-Al alloy      brittleness      Yttrium      Received:  18 October 1992      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/Y1992/V28/I10/29 1 肖纪美.不锈钢的金属学问题.北京:冶金工业出版社,1983 2 杜国维,杜永良,章小雁.北京钢铁学院学报,1988;10:368 3 Li Bei, Yan Yuxin, Meng Guang'en, Wu Shuangxia, Tang Fenghuang. Chin J Met Sci Technol, 1991; 7: 40 4 李碚,吴双霞.钢铁,待发表 5 徐祖耀.相变原理.北京:科学出版社,1988% [1] QIAN Yue,SUN Rongrong,ZHANG Wenhuai,YAO Meiyi,ZHANG Jinlong,ZHOU Bangxin,QIU Yunlong,YANG Jian,CHENG Guoguang,DONG Jianxin. Effect of Nb on Microstructure and Corrosion Resistance of Fe22Cr5Al3Mo Alloy[J]. 金属学报, 2020, 56(3): 321-332. [2] XIAO Chengbo;HAN Yafang (Beijing institute of Aeronautical Materials; Beijing 100095). MECHANISM OF IMPROVING THE COHERENCE BETWEEN OXIDE SCALE AND SUBSTRATE OF Ni_3Al BASE ALLOY IC6 BY YTTRIUM[J]. 金属学报, 1998, 34(11): 1158-1162. 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