Microstructure and Electrochemical Corrosion Behavior of TC4 Titanium Alloy Cladding Layer Prepared with Powder Feeding Laser Additive Manufacturing

Xiaotian, 冯晓甜 Feng; Hong, 顾宏 Gu; Shengfeng, 周圣丰 Zhou; Jianbo, 雷剑波 Lei

doi:10.3788/cjl201946.0302003

Cited by 4 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Usually corrosion current density and self-corrosion potential are considered to be important parameters to evaluate the corrosion resistance of materials, in which the corrosion current density determines the corrosion rate of the material, the lower the current density, the slower the corrosion rate of the material. The corrosion potential, which is the potential value of the curve when the corrosion current is minimum, reflects the corrosion trend of the material, the larger the value is, the less likely the material is to be corroded (Sanchez-Tovar et al, 2013;Feng et al, 2019). According to Figure 9, the corrosion current of LMD layer is lower than that of EHLMD layer, indicating that the corrosion speed of LMD layer is slower.…”

Section: Phase and Microhardnessmentioning

confidence: 99%

Comparison on Microstructure and Properties of Stainless Steel Layer Formed by Extreme High-Speed and Conventional Laser Melting Deposition

Shen¹,

Du²,

Wang³

et al. 2019

Front. Mater.

View full text Add to dashboard Cite

A new technology named extreme high-speed laser melting deposition is presented in this paper. The deposition speed of this technology is as high as 30 m/min, which can promote the deposition efficiency from 0.09 to 0.54 m 2 /h. In addition, surface of EHLMD layer is smoother which can save part of the machining process after deposition and promotes the production efficiency by 6 times. AISI 431 martensitic stainless steel layers were fabricated on 27SiMn substrate by conventional laser melting deposition and extreme high speed laser melting deposition. The macroscopic morphology, microstructure, microhardness, and electrochemical corrosion resistance of the two kinds of layers were characterized. The results show that the microstructures of two kinds of layers comprise of martensite dendrite, retained austenite, and continuous inter-dendritic eutectic phases. Although results of the XRD test indicate that there are more retained austenite in the EHLMD layer, the microhardnesses of the two kinds of layers are basically the same, in the range of 600 to 720 HV. Corrosion resistance of the EHLMD layer is better than that of the LMD layer because of the higher Cr content and more uniform alloying elements distribution. Therefore, EHLMD can be considered as an effective alternative to electroplating and applied for production and repair of shaft parts in the manufacturing field.

show abstract

Section: Phase and Microhardnessmentioning

confidence: 99%