A STUDY OF THE HELIUM IMPLANTED INTO HR-1 STAINLESS STEEL BY PROTON ELASTIC SCATTERING

Li Yupu，

Wang Peixuan，

Ma Ruzhang，

Zhang Guoguang，

Feng Yongrong，

Liu Jiarui，

Zhu Peiran，

Qiu Changqing，

Xu Tianbing

Nuclear Science and Techniques

Vol.2, No.1

pp.25-28

Published in print 01 Feb 1991

24500

Small discs of type HR- 1 austenitic steel (OCr₁₇Ni₁₄MnMo) have been irradiated with 30-170 keV He⁺ for doses 10¹⁶- 1×10¹⁸/cm² at 300K. 2.5 MeV enhanced proton backscattering, TEM, SEM and CEMS are used to investigate the He trapping, bubble structures and the phase stability. It is found that a maximum He concentration of ~28. at. % was obtained after implantation with 70 keV He⁺ at a dose just below critical. The micro- Vickers hardnesses of irradiated layers decrease with increasing dose, particularly when dense bubbles formed. The isomer shift of CEMS increases in the negative direction after irradiation. The austenite is believed to be stable against radiation induced martensitic transformation.

HeliumIon implantationProton elastic scatteringStainless steel

REFERENCES

[1]

B.M.U. Scherzer et al., Rad. Eff., 78 (1983), 417.

[2]

W. Jager et al., Nucl. Instr. Meth., 182/183 (1981), 975.

[3]

P.B. Johnson et al., Rad. Eff., 78 (1983), 147.

[4]

T. Fukanori et al., J. Nucl. Mater., 133/134 (1985), 277.

[5]

Li Yupu et al., Proc. int. symp. small accelerator and ion beam applications, Jinan, China, 1987, in press.

[6]

R.S. Blewer, Ion beam surface layer analysis. Plenum, New York, 1976 p.185.

[7]

B. Terreault et al., J. Appl. Phys., 51 (1980), 1491.

[8]

H.O. Hall, J. Nucl. Mater., 117 (1983), 89.

[9]

P. Gutlich, Mössbauer spectroscopy and transition metal chemistry, Berlin, Springer- Verlag, 1978, p.18.

[10]

N. Hayashi et al., Appl. Phys. Lett., 41 (1982), 1100.