Acta Metall Sin  1992, Vol. 28 Issue (9): 17-24    DOI:

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EFFECTS OF B~+ IMPLANTATION ON MECHANICAL PROPERTIES AND MICROSTRUCTURE OF POLYCRYSTALLINE Ni

CHEN Lifan; BA Tu; Sill Changxu (State key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; Academia Sinica; Shenyang)

CHEN Lifan; BA Tu; Sill Changxu (State key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; Academia Sinica; Shenyang). EFFECTS OF B~+ IMPLANTATION ON MECHANICAL PROPERTIES AND MICROSTRUCTURE OF POLYCRYSTALLINE Ni. Acta Metall Sin, 1992, 28(9): 17-24.

Abstract References Related Articles Recommended Metrics Download:  PDF(2585KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Polycrystalline Ni was implanted with 50 keV B~+ to a dose of 3×10~(17) ions/cm~2 at room temperature. The specimens with and without B~+ implantation were tested in micro-hardness and load or unload tensile fatigue under stress-controlled condition. The surface layer structure was observed with IMA, SEM and TEM before and after implantation and/or fatigue. The B~+ implanted surface region consists of amorphous Ni-B phase, Ni_3B and Ni_4B_3 second phases, and damage structure. The corresponding measurements indicate that both surface micro-hardness and endurance limit of the specimens have increased after implantation. Compared with unimplanted specimens under the same fatigue condition, all implanted specimens show the smallest overall fatigue damage. The cyclic loading at room temperature can lead to migration of implanted B~+ out of surface layer and recrysatallization of amorphous Ni-B phase. Possible strengthening mechanisms for these experimental results were discussed. Key words:  ion implantation      fatigue      polycrystalline Ni      implanted layer      Received:  18 September 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/I9/17 1 Picraux S T, Pope L E, Science, 1984; 226: 615 2 Hohmuth K, Richter E, Rauschenbach B, Blochwitz C. Mater Sci Ehg, 1985; 69:191 3 Herman H. Nucl Instrum Methods, 1981; 182/183: 887 4 Perry A J. Surf Eng, 1987; 3(2) : 154 5 Vardiman R G, Cox J E. Acta Metall, 1985; 33: 2033 6 Kujre A, Charkabortty S B, Starke E A Jr. Nucl Instrum Methods, 1981; 182/183:949 7 Xu M H, Patu S, Wang Z G. Phys Status Solidi, 1988; 105a; 419 8 McHargue C J. 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