title: Austenite layer and precipitation in high Co-Ni maraging steel.
abstract: In high Co-Ni maraging steel, austenite has a great effect on the fracture toughness of the steel and the precipitated carbides are the main strengthening phase. In this study, both austenite layers and precipitation were observed and their formation theory was analyzed by Thermo-Calc simulation and several reported results. TEM and HRTEM observation results showed that the thickness of the austenite layers was about 5-10 nm and the length of the needle-like precipitated carbides was less than 10nm. The carbides maintained coherent or semi-coherent relation with the matrix.
authors.affiliation: Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Chenchong
authors.initials: C
authors.lastname: Wang
authors.affiliation: Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. Electronic address: chizhang@tsinghua.edu.cn.
authors.forename: Chi
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Yang
keywords: Austenite layer; High resolution transmission electron microscopy; Precipitated carbides