HARDENNING AND SOFTENNING EFFECTS OF Fe-Cu NANOCRYSTALLINE SUPERSATURATED SOLID SOLUTION FORMED BY MECHANICAL ALLOYING
LI Bolin;ZHU Min; LI Long; LUO Kanchang;LI Zuxin (South China University of Technology; Guangzhou 510641)(Manuscript received 1996-03-19; in revised form 1996-07-15)
Cite this article:
LI Bolin;ZHU Min; LI Long; LUO Kanchang;LI Zuxin (South China University of Technology; Guangzhou 510641)(Manuscript received 1996-03-19; in revised form 1996-07-15). HARDENNING AND SOFTENNING EFFECTS OF Fe-Cu NANOCRYSTALLINE SUPERSATURATED SOLID SOLUTION FORMED BY MECHANICAL ALLOYING. Acta Metall Sin, 1997, 33(4): 420-426.
Abstract In present work nanocrystalline supersaturated solid solutions (NSSS) with bcc and fcc structures were prepared in Fe-rich and Curich compostion of immiscible Fe-Cu system respectively by mechanical alloying. The effects of grain size and composition on the hardness of Fe-Cu NSSS have been studied by X-ray diffraction and Vickers hardness measurement. It has been found that the hardness of NSSS formed in Cu-rich composition increases with the increase of Fe, its solute atom content. On the contrary, the hardness of NSSS formed in Fe-rich composition decreases with the increase in Cu content.The hardenning and softenning caused by the dissolving of Fe and Cu respectively have been discussed based on the structure feature of NSSS and estimation of the strength of grain boundary and crystal components of NSSS.
1 Nieman G W,Weertman J R,Siegel R W.J Mater Res, 1991;6:1012 2 Koch C C, Cho Y S.Nanostruct Mater,1992; 1: 207 3 Lu K,Wei W D,Wang J T.Scr Metall Mater,1990;24:2319 4 Christman T,Jain M.Scr Metall Mater,1991;25:767 5 Nieh T G,Wadseworth.Scr Metall Metaer,1991;25:955 6 Fecht H J.In:Hadjipanayis G C,Siegel R W eds,Nanophase Materials, Klewer Academic publisher,1994: 125 7 Lu K,Sui M L.Scr Metall Mater,1993;28:1465 8 Palumbo G,Thorpe S J,Aust K T.Scr Metall Mater,1990;24:1347 9 Zhu M,Fecht H J.Nanostruct Mater,1995;6:921 10 Uenishi K Kobayashi K F,Nasu S,Hatano H,Ishihara K N,Shingu P H.Z Metallk,1992;83:132 11 Eckert J,Holzer J C,Krill C E, Johnson W L.J Appl Phys,1993;73:2794 12 Yavari A R,Desere P J,Menameur T,Phys Rev Lett,1992;68:2235 13 Ma E, Atzmon M,Pinkerton P E,J Appl Phys,1993;74:955 14 Miedema A R, Broeder F J A. Z Metallk,1979;70:14
REN Shan; HONG Lan; ZHANG Jinxiu (Department of Physics; Zhongshan University; Guangzhou 510275)LU Manqi; HU Zhuangqi (State Key Lab of RSA; Institute of Metal Research; Shenyang 110015). HYDROGEN INDUCING AMORPHIZATION OF Ti-Fe SYSTEM IN MECHANICAL ALLOYING[J]. 金属学报, 1998, 34(4): 373-377.
YANG Junyou; WU Jiansheng; ZENG Zhenpeng(The Open Laboratory of Education Ministry for High Temperature Materials and High Temperature Tests;Shanghai Jiaotong University; Shanghai 200030)Correspondent: YANG Junyou; postdoctoral research;Tel: (021)62812440;E-mail: jggang@ mail.sjtu.edu.cn. INVESTIGATION ON THE DEFORMATION AND ENERGY TRANSFER OF POWDERS DURING MECHANICAL ALLOVING[J]. 金属学报, 1998, 34(10): 1061-1067.
