Effect of Mo on the σ phase precipitation behavior of super austenitic stainless steel

Qun-kun Hu, Hua-yun Du, Xiaolu Sun, Li-feng Hou, Qian Wang, Zhanhu Guo, Handong Li, Jincheng Fan, Ying-hui Wei, Xiao-da Liu, Huan Wei, Xingkui Guo

Research output: Contribution to journalArticlepeer-review

Abstract

The aging precipitation behavior of super austenitic stainless steels 904L (4.32% Mo), 254SMo (6.06% Mo), and AL-6XN (6.29% Mo) with different Mo contents at 800°C-900°C was investigated by scanning electron microscopy, X-ray diffraction, and transmission electron microscopy, and the effect of Mo content on the σ-phase precipitation behavior of commonly used super austenitic stainless steels was explored. The effect of Mo content on the σ-phase precipitation behavior of commonly used super austenitic stainless steel was investigated. The results show that the super austenitic stainless steels with different Mo contents formed different numbers and shapes of σ-phases in the isothermal aging process, and the number of σ-phases of 254SMo and AL-6XN is much larger than that of 904L, and the shape of the σ-phases mainly shows coarse acicularity and elongation, while the σ-phases of 904L show fine granularity.
Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalEmerging Materials Research
Volume13
Issue number2
Early online date12 Feb 2024
DOIs
Publication statusE-pub ahead of print - 12 Feb 2024

Cite this