%0 Journal Article
%T Effect of Heat Treatment on the Microstructure of Multiphase NiAl-based Alloy<br>
%A Yi XIE
%A Lanzhang ZHOU
%A Jianting GUO
%A Hengqiang YE
%A <br>
%J 材料科学技术学报
%D 2008
%I 
%X The alloy Ni-Al26.6-Cr13.4-Co8.l-Ti4.3-W1.3-Mo0.9 (at. pct) was fabricated from superalloy K44 and Al element using vacuum induction and casting technique. Investigations to this alloy reveal that a new phase Cr3Ni2 possessing low melting point and poor ductility is formed, which is distributed as a network along NiAl matrix grain boundaries. Subsequent different solution and aging treatments are carried out and lead to microstructural changes to various extents. Rapid cooling after solution at 1250℃ for 20 h gives rise to macrocracks in the specimen while slow cooling after the same treatment results in the formation of spheric α-Cr solid solution and needle-like Ni3Al phase, which are embedded in NiAI matrix. It is comfirmed that aging treatments initiate lath-shaped Ni3Al phase and pearl-shaped a-Cr phase to precipitate from the NiAl matrix, which own orientation relationships with these precipitates.
%K NiAl
%K Intermetallics
%K Microstructure
%K Solution and aging treatments<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=50B05B8B8E890AE50AA07AC93B2B6018&yid=67289AFF6305E306&vid=B91E8C6D6FE990DB&iid=0B39A22176CE99FB&sid=E2E0FBFE4D7EFB94&eid=1D01216AD76577EC&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=26