Measurement of the Orientation Distribution of Grains in Titanium Sheets by Etch Pit Method

• Murayama Yonosuke

  The Research Institute for Iron, Steel and Other Metals, Tohoku University

• Obara Kazuo

  The Research Institute for Iron, Steel and Other Metals, Tohoku University

• Tanaka Eihachiro

  Professor Emeritus, Tohoku University

抄録

In this experiment, the procedure to form oriented etch pits on a commercially pure titanium sheet was presented, and the feature of the orientation distribution of grains, containing the orientation relation between neighboring grains, was analyzed by the etch pit method. The shape of the etch pit is coincident with that introduced from the rotation of the 14-hedral model formed by the {0001} planes and the {10\bar11} planes. Shape parameters, R_c, R_p and R_a, have the following relation. R_c:R_p=1:1.4 (R_a=R_p/sin(61.4 π/180)=1.6).<BR>Using such oriented etch pits, the feature of the orientation distribution in two differently textured titanium sheets were examined. In the sheets cross rolled at 873 K, 61% of the grains have the c-axis normal to the sheet plane. The preferred orientation is (0001)[10\bar10] and the number of grains with such an orientation are 23.1%. The frequency of the orientation difference of the c-axis between neighboring grains with angles between 0 and π/18 is over 80%. In the sheets rolled unidirectionally at 1173 K, the grains with the c-axis parallel to the sheet plane are 50%. The grains with the orientation in the range from (10\bar10)[11\bar25] to (10\bar10[11\bar217] are 12.5% in number. The preferred orientation is ranged from (10\bar10)[11\bar25] to (10\bar10)[11\bar217]. The orientation difference of the c-axis between neighboring grains is distributed broadly in the whole range from 0 to π/2, so that this distribution is extremely different from that of the sheets cross rolled at 873 K.

収録刊行物

• Transactions of the Japan Institute of Metals

  Transactions of the Japan Institute of Metals 27 (11), 898-904, 1986

  社団法人 日本金属学会

キーワード

• etch pit method
• polyhedral model
• texture
• titanium
• relation of the orientation between neighboring grains

詳細情報

• CRID: 1390001205117843584
• NII論文ID: 130003486265
• DOI: 10.2320/matertrans1960.27.898
• ISSN: 24324701
• ISSN: 00214434
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1960/27/11/27_11_898/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可