High temperature tensile properties of directionally solidified Ni-43Ti-4Al-2Nb-2Hf alloy
来源期刊：Rare Metals2012年第4期
论文作者：JIANG Dongwen,ZHENG Lijing,ZHOU Lei,PAN Liwen,TANG Xiaoxia,and ZHANG Hu School of Materials Science and Engineering,Beijing University of Aeronautics and Astronautics,Beijing ,China
文章页码：328 - 331
摘 要：By liquid metal cooling（LMC） process,the Ni-43Ti-4Al-2Nb-2Hf（%,atomic fraction） alloy was directionally solidified（DS）.The microstructure and tensile properties at room and elevated temperature were investigated.It was found that the DS process significantly improves the room temperature tensile strength,increasing by 70% compared with the as-cast alloy.After appropriate heat treatment（HT）,the average tensile strength reaches above 1900 MPa,nearly twice of the as-cast one.At 800 and 900 ℃,the tensile strengths are about 308 and 169 MPa,respectively.
JIANG Dongwen,ZHENG Lijing,ZHOU Lei,PAN Liwen,TANG Xiaoxia,and ZHANG Hu School of Materials Science and Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191,China
摘 要：By liquid metal cooling（LMC） process,the Ni-43Ti-4Al-2Nb-2Hf（%,atomic fraction） alloy was directionally solidified（DS）.The microstructure and tensile properties at room and elevated temperature were investigated.It was found that the DS process significantly improves the room temperature tensile strength,increasing by 70% compared with the as-cast alloy.After appropriate heat treatment（HT）,the average tensile strength reaches above 1900 MPa,nearly twice of the as-cast one.At 800 and 900 ℃,the tensile strengths are about 308 and 169 MPa,respectively.
关键词：
