Effect of rare earth Er on the microstructure and mechanical properties of high temperature titanium alloys - 文章详情页

作者：

Li, Bo Long (Li, Bo Long.) | Wang, Tong Bo (Wang, Tong Bo.) | Han, Peng (Han, Peng.) | Wang, Zhen Qiang (Wang, Zhen Qiang.) | Nie, Zuo Ren (Nie, Zuo Ren.) (学者：聂祚仁)

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EI Scopus

摘要：

The　microstructures　and　mechanical　properties　of　the　high　temperature　titanium　alloys　containing　Er,　i.e.　Ti-6Al-2.5Sn-4Zr-0.3Mo-1Nb-0.35Si-xEr　(x=0,　0.1,　0.3wt%),　were　investigated.　Both　the　grain　size　and　lamellar　structure　inside　grains　were　significantly　refined　with　the　addition　of　Er　in　as-cast　alloys.　Lamellar　and　duplex　microstructures　were　obtained　after　forging　and　heat　treatment.　Silicide　precipitates　were　generated　in　the　boundary　of　lamellar　α　phase　after　aging　treatment.　Meanwhile,　a　few　α2　phase　were　precipitated　in　the　alloys　after　aging　treatment.　After　600°C/100h　thermal　exposure,　the　α2　phases　with　a　mean　size　of　7nm　and　spacing　of　10　nm　were　precipitated　homogeneously　in　a　lamellar.　The　creep　properties　were　significantly　improved　by　the　addition　of　rare　earth　Er　due　to　the　formation　of　the　second　phase　containing　Er,　silicide　and　α2　phase.　©　2017　Trans　Tech　Publications,　Switzerland.

关键词：

Erbium alloys Silicides Microstructure Lamellar structures Rare earths Titanium alloys Mechanical properties

作者机构：

[ 1 ] [Li, Bo Long]College of Material Science and Engineering, Beijing University of Technology, Beijing, China
[ 2 ] [Wang, Tong Bo]College of Material Science and Engineering, Beijing University of Technology, Beijing, China
[ 3 ] [Han, Peng]College of Material Science and Engineering, Beijing University of Technology, Beijing, China
[ 4 ] [Wang, Zhen Qiang]College of Material Science and Engineering, Beijing University of Technology, Beijing, China
[ 5 ] [Nie, Zuo Ren]College of Material Science and Engineering, Beijing University of Technology, Beijing, China

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