Mechanical properties and corrosion behavior of electron beam cold hearth melting high strength and high corrosion resistant Ti-0.3Mo-0.8Ni alloy with different states

Meiyu Hou; Hongyan Wang; Peng Shao; Sheng Huang; Ping Ding; Yaoping Xu; Han Xiao; Xuan Chen

Journal of Science: Advanced Materials and Devices (Jun 2024)

Mechanical properties and corrosion behavior of electron beam cold hearth melting high strength and high corrosion resistant Ti-0.3Mo-0.8Ni alloy with different states

Meiyu Hou,
Hongyan Wang,
Peng Shao,
Sheng Huang,
Ping Ding,
Yaoping Xu,
Han Xiao,
Xuan Chen

Affiliations

Meiyu Hou: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China; National-Local Joint Engineering Laboratory for Technology of Advanced Metallic Solidification Forming and Equipment, Kunming University of Science and Technology, Kunming, 650093, China
Hongyan Wang: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China; National-Local Joint Engineering Laboratory for Technology of Advanced Metallic Solidification Forming and Equipment, Kunming University of Science and Technology, Kunming, 650093, China
Peng Shao: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China; National-Local Joint Engineering Laboratory for Technology of Advanced Metallic Solidification Forming and Equipment, Kunming University of Science and Technology, Kunming, 650093, China
Sheng Huang: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China; National-Local Joint Engineering Laboratory for Technology of Advanced Metallic Solidification Forming and Equipment, Kunming University of Science and Technology, Kunming, 650093, China
Ping Ding: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China; National-Local Joint Engineering Laboratory for Technology of Advanced Metallic Solidification Forming and Equipment, Kunming University of Science and Technology, Kunming, 650093, China
Yaoping Xu: Yunnan Titanium Industry Co. Ltd, Chuxiong, Yunnan, 651209, China
Han Xiao: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China; National-Local Joint Engineering Laboratory for Technology of Advanced Metallic Solidification Forming and Equipment, Kunming University of Science and Technology, Kunming, 650093, China; Corresponding author. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
Xuan Chen: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China; National-Local Joint Engineering Laboratory for Technology of Advanced Metallic Solidification Forming and Equipment, Kunming University of Science and Technology, Kunming, 650093, China; Corresponding author. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China.

Journal volume & issue: Vol. 9, no. 2
p. 100679

Abstract

Read online

In this study, a large size Ti-0.3Mo-0.8Ni (TA10) alloy ingot melted by electron beam cold hearth melting (EBCHM) technology was investigated. The microstructure, mechanical properties, and corrosion behavior of as-cast, hot-rolled, and annealed TA10 alloys were investigated. The results show that different states of TA10 alloys have different microstructure and properties. The microstructure of the as-cast TA10 alloy exhibits the Widmanstätten α phase, and the hot-rolled TA10 sheet shows a fibrous structure with an obvious rolling streamline. After 650 °C annealing, the intergranular β phase decreases, and most of the strip α phase changes to the equiaxed α phase. With the annealing temperature increasing to 840 °C, the microstructure gradually changed from an equiaxed structure to a duplex structure. The mechanical properties of the TA10 alloy were enhanced after hot-rolling with an increase in ultimate tensile strength from 386.5 MPa to 610 MPa. Additionally, the elongation increased from 15.6 % to 23.3 %. Upon annealing at varying temperatures, it was observed that the strength decreased, reaching to 423.5 MPa at 650 °C and 478.2 MPa at 840 °C, while the plasticity increased significantly, reaching to 26.5 % at 650 °C and 28.6 % at 840 °C. The improved strength was attributed to the better grain boundary slip of the equiaxed structure. The corrosion resistance of titanium alloys is closely connected with their microstructure. The results of the immersion corrosion test indicate that the samples in various states exhibit similar corrosion behavior. Additionally, the hot-rolled TA10 alloy shows the highest corrosion resistance, with a lower corrosion rate of 0.34459 mm/year. The as-cast TA10 alloy shows the lowest corrosion resistance, with a lower corrosion rate of 1.37559 mm/year.

Published in Journal of Science: Advanced Materials and Devices

ISSN: 2468-2284 (Print); 2468-2179 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/journal-of-science-advanced-materials-and-devices

About the journal

Abstract

Keywords