Ll<SUB>2</SUB>型金属間化合物Ni<SUB>3</SUB>Alのホウ素添加による常温延性の改善

• 青木 清

  東北大学金属材料研究所

• 和泉 修

  東北大学金属材料研究所

書誌事項

タイトル別名

• Improvement in Room Temperature Ductility of the L1<SUB>2</SUB> Type Intermetallic Compound Ni<SUB>3</SUB>Al by Boron Addition
• Ll2型金属間化合物Ni3Alのホウ素添加による常温延性の改善
• Ll2ガタ キンゾクカン カゴウブツ Ni3Al ノ ホウソ テンカ ニヨル

抄録

The room temperature ductility of the L1₂ type intermetallic compound Ni₃Al which has been accepted to be brittle so far was improved considerably by a small addition of boron. Binary Ni₃Al poly-crystals without boron did not exhibit any ductility at room temperature in agreement with previous reports, while those to which boron was added showed considerable ductility as determined from the bending, cold-rolling and tensile tests. Improvement of the room temperature ductility by boron addition did not bring about lowering of the yield strength of Ni₃Al. Fracture mode changes trom the intergranular one which is typical for the alloy without boron to the transgranular type in the alloys containing a small amount of boron. Boron appeared to be the effective element which suppress the intergranular fracture. The mechanism of the improvement of the room temperature ductility was discussed based on impurity segregation to grain boundaries or the peculiarity of the grain boundary structure.

収録刊行物

• 日本金属学会誌

  日本金属学会誌 43 (12), 1190-1196, 1979

  公益社団法人 日本金属学会

キーワード

• Materials Chemistry
• Metals and Alloys
• Mechanics of Materials
• Condensed Matter Physics

詳細情報

• CRID: 1390282681462485504
• NII論文ID: 130007339614
• NII書誌ID: AN00187860
• DOI: 10.2320/jinstmet1952.43.12_1190
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• NDL書誌ID: 2071456
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I2071456
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet1952/43/12/43_12_1190/_pdf
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