Effects of Consolidation Process on the Microstructure and Mechanical Properties of ODS Ferritic Alloy

摘要：

　　The oxide-dispersion-strengthened (ODS) ferritic alloy powders (Fe-14Cr-3Al-2W -0.1Ti-0.35Y2O3) were prepared by mechanical alloying (MA) at a rotation speed of 720 rpm for 24 h.All the elements were mixed homogenously in the powder,and Cr and Al dissolved in α-Fe after MA.The bulk samples were produced by spark plasma sintering (SPS) at 950 ℃ and 50 MPa and by hot isostatic pressing (HIP) at 1150 ℃ and 130 MPa,respectively.The SPS sample showed a tensile strength of 730 MPa and a poor ductility due to the existence of pores in microsize.The HIP sample had a high tensile strength of 980 MPa,yield strength of 710 MPa and elongation of 10.3 %.The excellent mechanical properties of the HIP sample was due to the small grain size of the matrix of about 400 nm and the fine oxide particles of 5-40 nm.

关键词： ODS alloy Mechanical alloying Spark plasma sintering Hot isostatic pressing:Microstructure Mechanical property

作者: Tong Liu Hailong Shen Tongwen Zhang Mu Zhu Chenggong Qin

作者单位: Key Laboratory of Aerospace Materials and Performance(Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 507-512

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）