書誌事項
- タイトル別名
-
- Optical and electron microscopic observation of structure changes during aging of an Al-0.2% Zr alloy
- Al-0.2パーセント Zr ゴウキン ノ ジコウ セキシュツ ノ ソシキ カンサツ
この論文をさがす
抄録
Structural changes during aging of an Al-0.22wt% Zr alloy at 350, 400 and 450°C for 8-10000 hours were studied by means of optical and electron microscopes. In the initial stage of aging, dendritic or rodshaped precipitates were formed behind moving boundaries. Growth of these precipitates due to a grain boundary reaction was retarded by development of precipitation within grains. The dentritic or rod-shaped precipitates had an ordered cubic crystal structure of L12 type, a metastable Al3Zr which did not change during the aging interval employed in the present study. <br>Precipitation of the equilibrium phase of Al3Zr with ordered tetragonal structure of DO23 type was also found at grain boundaries by prolonged aging. A new orientation relationship between the equilibrium Al3Zr phase and the matrix was established.<br>Coherent spherical particles were also observed within grains. The particles were round to nucleate homogeneously at 350°C. However, at higher temperature aging, they showed tendency to nucleate preferentially at dislocations or original grain boundaries. Growth of these precipitates by prolonged aging accompanied loss of coherency and occurred preferentially along the <100> and <100> matrix directions, resulting in fobrmation of protrusions. It was found that these precipitate were Al3Zr with L12 type structure. Plate like coherent precipitates, elongating along the <100> matrix directions, were sparsely observed within grains. These precipitates grew large and lost coherency with the matrix by generations of interfacial dislocations around them.
収録刊行物
-
- 軽金属
-
軽金属 23 (5), 194-201, 1973
一般社団法人 軽金属学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390282681317661440
-
- NII論文ID
- 130004207700
- 10003795637
-
- NII書誌ID
- AN00069773
-
- COI
- 1:CAS:528:DyaE2cXntlejsw%3D%3D
-
- ISSN
- 18808018
- 04515994
-
- NDL書誌ID
- 7529739
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可