Acta Metall Sin  1998, Vol. 34 Issue (11): 1193-1198    DOI:

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THE EFFECT OF PARTICLE SHAPE ON DUCTILITIES OF SiC_p/LD2 COMPOSITES

QIN Shuyi;WANG Wenlong;ZHANG Gooding (State Key Lab of Metal Matrix Composites;Shanghai Jiao Tong University;Shanghai 200030)

QIN Shuyi;WANG Wenlong;ZHANG Gooding (State Key Lab of Metal Matrix Composites;Shanghai Jiao Tong University;Shanghai 200030). THE EFFECT OF PARTICLE SHAPE ON DUCTILITIES OF SiC_p/LD2 COMPOSITES. Acta Metall Sin, 1998, 34(11): 1193-1198.

Abstract References Related Articles Recommended Metrics Download:  PDF(2715KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Blunted SiC particles were selected as reinforcement to fabricate SiC./LD2 composites. Compared with a general SiC particle,the blunted SiC. reinforced composite has higher ductility.Analysises of finite element method(FEM) and tensile fractographic scanning electron microscope(SEM)show that particle fracture is the main failure mechanism of composites after T6 treatment.The ductility improvement of processed SiCp/LD2 is attributed to decrease the heat-residual-strain concentration near penetrating particle corner and the possibility of penetrating particle corner fracturing at low level of external strain when the penetrating particle corner has been blunted. The main failure mechanism of composites after extruded but no T6 treatment is matrix failure. Therefore, extent of ductility improving of composites after T6 treatment is higher than that of composites after extruded. Key words:  metal matrix composite      particle shape      mechanical property      heat treatment      Received:  18 November 1998      Service E-mail this article Add to citation manager E-mail Alert RSS Collect articles（） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1998/V34/I11/1193 1 Mummery P,Derby B.Mater,Sci Eng,1991;A135:221 2 Zhou Z, Song Z J, Xu Y K. Mater Sci Eng; 1991;A132:83 3 Doel T J A,Bowen P.Mater Sci Tech,1996; 12:586 4 Wei L,Huang J C.Mater Sci Tech,1993; 9:841 5 David D L.Metall Trans, 1991; 22A: 113 6 Flom Y,Arsenault R J.Acta Metall,1989;37:2413 7 Song S G,Shi N,Gray ⅢG T, Roberts J A.Metall Mater Trans,1996;27A:3739 8 Manoharan M,Lewandowski J J.Scr Metall,1989;23:301 9 Lewandowski J J, Liu C, Hunt W H. 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