素粉末混合法により製造したＮｉ３Ａｌ金属間化合物の機械的性質

• 落合 鍾一

  帝京科学大学物質工学科

書誌事項

タイトル別名

• Mechanical Properties of Ni3Al Intermetallic Alloys Produced by Blended Elemental Method.
• ソ フンマツ コンゴウホウ ニ ヨリ セイゾウシタ Ni3Al キンゾクカン

抄録

The Ni₃Al intermetallic alloys with the composition of Ni-25mol%Al were produced by powder metallurgical method using elemental powders of nickel and aluminum. After blending starting powders, sintering was performed by hot press process. Some sintered alloys were heat treated for homogenization. Influence of the microstructural change caused by the heat treatment on the mechanical properties for compacts was investigated. Although the mean grain diameter of as-sintered alloys was about 32μm, finer microstructures with the diameter of less than 7μm were achieved by homogenization heat treatment, Alloys were found to be composed of single Ni₃Al phase and the degree of long range order increased with homogenization time. As-hot pressed alloy revealed the flow stress at room temperature of about 300MPa, whereas the homogenized alloy showed that of about 700MPa. Flow stress was analyzed by decomposing it to σ_G, σ_H and σ_p, which were the stress components concerning Peierls force, positive temperature dependence of flow stress, and grain diameter respectively. The Hall Petch parameter, k_y, was about 1.3 at room temperature and had the tendency to decrease with temperature.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 44 (10), 939-944, 1997

  一般社団法人 粉体粉末冶金協会

キーワード

• Ni<SUB>3</SUB>Al
• intermetallic compound
• powder metallurgy
• hot press
• mechanical property

詳細情報

• CRID: 1390001206308893696
• NII論文ID: 10002261551
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.44.939
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 4324258
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4324258
• 本文言語コード: ja
• データソース種別:
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