Published July 2006 | Version v1
Journal article Metadata-only

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

Creators

  • 1. Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu (China)
  • 2. Key Laboratory for Radiation Physics and Technology of Ministry of Education, Sichuan Univ., Chengdu (China)

Description

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 x 1016 cm-2 or 1 x 1017 cm-2 is investigated. The maximum temperature during the implantation was monitored to be less than 200 degree C. The base pressure in the vacuum chamber was 6 x 10-4 Pa, and the working pressure was 1.6 x 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 degree C. The results of TEM analysis show that helium bubbles and dislocation loops are formed in the near surface region. He-ion-implantation-enhanced hardening is due to formation of dislocation loops mainly. (authors)

Additional details

Publishing Information

Journal Title
High Power Laser and Particle Beams
Journal Volume
18
Journal Issue
7
Journal Page Range
p. 1208-1210
ISSN
1001-4322

INIS

Country of Publication
China
Country of Input or Organization
China
INIS RN
38065665
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ALUMINIUM ALLOYS; ANNEALING; DISLOCATIONS; DOSE-RESPONSE RELATIONSHIPS; HELIUM IONS; ION IMPLANTATION; KEV RANGE 10-100; MICROHARDNESS; MICROSTRUCTURE; MORPHOLOGY; RADIATION EFFECTS; TEMPERATURE DEPENDENCE; TITANIUM BASE ALLOYS; TRANSMISSION ELECTRON MICROSCOPY; VICKERS HARDNESS; ZIRCONIUM ALLOYS
Descriptors DEC
ALLOYS; CHARGED PARTICLES; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; ELECTRON MICROSCOPY; ENERGY RANGE; HARDNESS; HEAT TREATMENTS; IONS; KEV RANGE; LINE DEFECTS; MECHANICAL PROPERTIES; MICROSCOPY; TITANIUM ALLOYS; TRANSITION ELEMENT ALLOYS

Optional Information

Notes
5 figs., 2 tabs., 12 refs.