Effect of He on properties and microstructure of Ti-2Al-2.5Zr alloy

he xiao; feng xiang-dong; zhou ji-meng; liu yan-zhang; zu xiao-tao

Volume 18 Issue 07

Jul. 2006

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Article Navigation > High Power Laser and Particle Beams > 2006 > 18(07): 0-

he xiao, feng xiang-dong, zhou ji-meng, et al. Effect of He on properties and microstructure of Ti-2Al-2.5Zr alloy[J]. High Power Laser and Particle Beams, 2006, 18.

Citation:

he xiao, feng xiang-dong, zhou ji-meng, et al. Effect of He on properties and microstructure of Ti-2Al-2.5Zr alloy[J]. High Power Laser and Particle Beams, 2006, 18.

he xiao, feng xiang-dong, zhou ji-meng, et al. Effect of He on properties and microstructure of Ti-2Al-2.5Zr alloy[J]. High Power Laser and Particle Beams, 2006, 18.

Citation:

he xiao, feng xiang-dong, zhou ji-meng, et al. Effect of He on properties and microstructure of Ti-2Al-2.5Zr alloy[J]. High Power Laser and Particle Beams, 2006, 18.

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Effect of He on properties and microstructure of Ti-2Al-2.5Zr alloy

1.
Department of Applied Physics,University of Electronic Science and Technology of China,Chengdu 610054,China;
2.
Key Laboratory for Radiation Physics and Technology of Ministry of Education,Sichuan University,Chengdu 610064,China

Publish Date: 2006-07-15

Abstract

Abstract

Ion-implantation-enhanced hardening and microstructure change of a Ti-2Al-2.5Zr alloy by 75 keV helium ion implantation with the dose of 5×1016 cm-2 or 1×1017 cm-2 is investigated. The maximum temperature during the implantation was monitored to be less than 200 ℃. The base pressure in the vacuum chamber was 6×10-4 Pa, and the working pressure was 1.6×10-3 Pa. The morphology and the structure of the implant samples have been characterized by TEM using a JEOL 2010FEG at 200 keV. The surface characterization of samples was studied by Vickers hardness tests. The He-induced hardening was observed. The He-induced hardening decreases with annealing at 350 ℃ and 550 ℃. The results of TEM analysis show that helium bubbles and dislocation loops are formed in the near surface region. He-ion-i
- ti-2al-2.5zr alloy,
- he ion implantation,
- tem,
- microhardness

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