Effect of purity on dislocation-induced relaxations in molybdenum single crystals

Shigeru Suzuki, Alfred Seeger

研究成果: Conference contribution

抄録

Dislocation-induced relaxations in different molybdenum single crystals were investigated by means of low-frequency internal friction measurements in the temperature range of 20-600 K. The results indicated that the appearance of the dislocation-induced relaxations strongly depends on the purity of the molybdenum, although the intrinsic dislocation relaxations appeared at about 100 K and 450 K in the high-purity molybdenum. The molybdenum containing a small amount of carbon did not exhibit the intrinsic dislocation relaxations but rather revealed a modulus increase due to the dislocation pinning caused by the dissolved carbon. When the molybdenum containing a small amount of carbon was annealed up to 700 K, a new relaxation peak appeared at about 450 K. The activation process for this relaxation indicated that it could be attributed to the relaxation due to a carbon-dislocation interaction. In addition, it was shown that the dislocation-induced relaxations in medium-purity molybdenum were small, which was attributed to the residual substitutional impurities in the molybdenum.

本文言語English
ホスト出版物のタイトルDiffusion in Materials
編集者S.V. Divinski, N.A. Stolwijk, H. Bracht
出版社Trans Tech Publications Ltd
ページ106-111
ページ数6
363
ISBN(印刷版)9783038354277
DOI
出版ステータスPublished - 2015
イベントInternational Conference on Diffusion in Materials, DIMAT 2014 - Munster, Germany
継続期間: 2014 8 172014 8 22

Other

OtherInternational Conference on Diffusion in Materials, DIMAT 2014
CountryGermany
CityMunster
Period14/8/1714/8/22

ASJC Scopus subject areas

  • Radiation
  • Materials Science(all)
  • Condensed Matter Physics

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