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ID 115405
タイトル別表記
Precipitation Behavior of Wrought Fe-Ni-Based Alloy HR6W
著者
井和丸, 新 東京工業大学|日本精工
寺田, 芳弘 東京工業大学
キーワード
iron-nickel-based alloy
age-hardening
microstructure
Laves phase
time-temperature precipitation (TTP) diagram
資料タイプ
学術雑誌論文
抄録
Age-hardening behavior of Fe-Ni-based alloy HR6W was investigated at the temperature range between 973 K and 1073 K. Two-step increase in hardness is detected for the alloy at each temperature; the first increase in hardness results from the precipitation of M23C6 phase and the second one corresponds to that of Laves phase. The TTP (time-temperature precipitation) diagram for the alloy is established based on the results of hardness measurement and microstructure observation, where the precipitation of Laves phase is slower than that of M23C6 phase by three orders of magnitude and the nose temperature of Laves phase is above 1073 K. The M23C6 phase precipitates with plate-like morphology along grain-boundaries at the early stage of aging, followed by the precipitation of Laves phase with granular morphology with increasing aging time. It is found that the M23C6 and Laves phases are aligned under stress condition, due to their precipitation on the dislocations introduced during creep deformation.
掲載誌名
日本金属学会誌
ISSN
00214876
18806880
cat書誌ID
AN00062446
出版者
日本金属学会
83
1
開始ページ
30
終了ページ
35
発行日
2018-12-25
EDB ID
出版社版DOI
出版社版URL
フルテキストファイル
言語
jpn
著者版フラグ
出版社版
部局
理工学系