Title喷铸工艺制备NiAl-Cr(Mo)-(Hf,Dy)亚共晶合金的组织及室温力学性能(英文)
Other TitlesMicrostructure and room temperature mechanical properties of NiAl-Cr(Mo)-(Hf, Dy) hypoeutectic alloy prepared by injection casting
Authors盛立远
杨芳
奚廷斐
郑玉峰
郭建亭
Affiliation北京大学深圳研究院
北京大学工学院
深圳宝安国际机场
深圳航空有限责任公司
中国科学院金属研究所
KeywordsNiAl基亚共晶合金
喷铸


微观组织
力学性能
NiAl based hypoeutectic alloy
Hf
Dy
injection casting
microstructure
mechanical properties
Issue Date2013
Publishertransactions of nonferrous metals society of china
CitationTransactions of Nonferrous Metals Society of China.2013,(04),983-990.
Abstract采用普通重力铸造和喷铸制备NiAl-Cr(Mo)-(Hf,Dy)亚共晶合金,研究两种工艺制备的合金的微观组织和室温力学性能。结果表明,Hf和Dy元素的添加导致Ni_2AlHf Heusler相和Ni_5Dy相在NiAl/Cr(Mo)相界面析出。喷铸工艺促使部分Ni_2AlHf Heusler和Ni_5Dy相分别转变为Hf固溶体和Dy固溶体相,层片间距得到细化,共晶胞的面积比以及均匀分布的Ni_2AlHf、Ni_5Dy、Hf固溶体和Dy固溶体相增加。对比普通铸造合金,喷铸合金的室温性能得到明显提高。
The NiAl-Cr(Mo)-(Hf,Dy) hypoeutectic alloys were prepared by conventional casting and injection casting techniques respectively, and their microstructure and room temperature mechanical properties were investigated. The results reveal that with the addition of Hf and Dy, the Ni2AlHf Heusler phase and Ni5Dy phase form along the NiAl/Cr(Mo) phase boundaries in intercellular region. By the injection casting method, some Ni2AlHf Heusler phase and Ni5Dy phase transform into Hf and Dy solid solutions, respectively. Moreover, the microstructure of the alloy gets good optimization, which can be characterized by the fine interlamellar spacing, high proportion of eutectic cell area and homogeneously distributed fine Ni2AlHf, Ni5Dy, Hf solid solution and Dy solid solutions. Compared with conventional-cast alloy, the room temperature mechanical properties of injection-cast alloy are improved obviously.
URIhttp://hdl.handle.net/20.500.11897/175143
ISSN1003-6326
DOI10.1016/S1003-6326(13)62556-X
IndexedSCI(E)
EI
中国科技核心期刊(ISTIC)
中国科学引文数据库(CSCD)
Appears in Collections:深圳研究生院待认领
工学院

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