Effect of laser surface remelting on the corrosion behavior of commercially pure titanium sheet

Sun, Zhuo; Annergren, I.; Pan, Dawei; Mai, Tuan-Anh

doi:10.1016/s0921-5093(02)00477-x

Cited by 145 publications

(76 citation statements)

References 9 publications

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“…Micro-porosity has been observed on the surface of the laser-treated sample and more preferably in the region on the weld fillet. Besides that, the protuberance on this surface was observed, which corresponds to the region on the weld fillet, a similar result of this microstructure was given by authors Sun et al [7]. Figure 1 shows the cross-section analysis of the specimen, where the three different regions are observed: the melted zone, the interface between the treated region and the substrate, and specifically the substrate.…”

Section: Microstructural Studysupporting

confidence: 81%

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

Pariona¹,

Micene²

2017

ACES

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The laser surface remelting (LSR) treatment was performed to Al-2.0 wt% Fe alloy with a 2 kW Yb-fiber laser (IPG YLR-2000S). The substrate and laser-treated material characterization were executed using different techniques. Among them, the microstructure was analyzed by optical microscope, SEM, low-angle X-ray diffraction (LAXRD) and the corrosion test was made in aerated solution of 0.1 M H 2 SO 4 at a temperature of 25˚C ± 0.5˚C. As result was shown, the micrograph of LSR-treated material displaying can be a fine cellular structure and the existence of certain nanoporosities and a similar to a nano-dendritic growth was observed too. The characteristic of melted zone was constituted of metastable phases according to the result of x-rays and the behavior corrosion as a result of the LSR-treated sample, which it was shown to be more resistant to corrosion than the untreated sample. A comparative study was carried out of the cyclic polarization of the laser-treated and untreated samples, demonstrating that the reduction and oxidation reverse peaks were not observed and being the cyclic polarization behavior was of irreversible character in both samples, however, the LSR-treated sample propitious the passivity on the surface also reduced the corrosion phenomena. Wherefore, this type of laser-treated alloy can be applied in the aerospace, aeronautic and automobilist industries.

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Section: Microstructural Studysupporting

confidence: 81%

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

Pariona¹,

Micene²

2017

ACES

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“…Compared to the base material, the tensile strength is nearly the same, while the elongation is decreased significantly. According to [36], the strength of the existing phases demonstrates the following order: α' > α > β. Additionally, α' possesses very high hardness and low ductility and toughness [37]. The microstructure of the fusion zone consisted of martensite α' and a slender acicular α phase, whereas the microstructure of the heat affected zone consisted of acicular α phase, α' martensite, and β phase.…”

Section: Mechanical Properties Of the Jointsmentioning

confidence: 99%

Laser Welding of BTi-6431S High Temperature Titanium Alloy

Zeng

Oliveira

et al. 2017

Metals

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Abstract:A new type of high temperature titanium alloy, BTi-6431S, has recently become the focus of attention as a potential material for aircraft engine applications, which could be used up to 700 • C. Pulsed laser welding was used to butt join the BTi-6431S titanium alloy in order to understand the feasibility of using fusion-based welding techniques on this material. The effect of laser energy on the microstructure and mechanical properties of the joints was investigated. The microstructural features of the joints were characterized by means of microscopy and X-ray diffraction. Tensile testing was conducted at both room temperature and high temperature to simulate potential service conditions. The results show that the microstructure of the laser welded joints consists of primary α phase and needle α' phase, while the microstructure of the heat affected zone consists of α, β, and needle α' phases. The tensile strength of the welded joints at room temperature was similar to that of the base material, despite a reduction in the maximum elongation was observed. This was related to the unfavorable microstructure in the welded joints. Nonetheless, based on these results, it is suggested that laser welding is a promising joining technique for the new BTi-6431S titanium alloy for aerospace applications.

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“…In diffusion bonding, the bond strength is achieved by pressure, temperature, time of contact and cleanness of the surfaces, and these combinations are called as diffusion parameters (Rusnaldy, 2001). During welding processes, titanium alloy picks up oxygen and nitrogen from the atmosphere easily (Sun et al, 2003;Kahraman et al, 2007). For this reason, the process is shielded by argon gas.…”

Section: Introductionmentioning

confidence: 99%

Influencia del argón como gas protector en la difusión durante el proceso de unión de la aleación Ti6Al4V con el aluminio

Akca

Gürsel

2017

REVMETAL

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This study presents a diffusion bonding process of commercially pure aluminum to Ti-6Al-4V alloy. Prepared samples were exposed to temperature of 560, 600 and 640 °C for the bonding time of 30, 45 and 60 min at the atmosphere of argon gas and non-argon. Diffusion bonding is a dissimilar metal welding process which can be applied to the materials without causing any physical deformations. The processed samples were also metallographically prepared, optically examined followed by Vickers microhardness test in order to determine joint strength. Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) were used in this work to investigate the compositional changes in order to observe the influence of atmosphere shielding in the transition zone. The result of tests and analyses were tried to be compared with the effect of argon shielding. The significant influences have been observed in the argon shielding during diffusion bonding process.KEYWORDS: Argon gas shielding; Diffusion bonding; Dissimilar metal bonding; Solid-state bonding; Ti-6Al-4V alloy Citation / Citar como: Akca, E.; Gursel, A. (2017) "Influences of argon gas shielding on diffusion bonding of Ti-6Al-4V alloy to aluminum". Rev. Metal. 53(1): e088. http://dx.doi.org/10.3989/revmetalm.088 RESUMEN: Influencia del argón como gas protector en la difusión durante el proceso de unión de la aleación Ti6Al4V con el aluminio. Este estudio presenta los procesos de difusión durante la unión de aluminio puro con la aleación Ti6Al4V. Se expusieron probetas a las temperaturas de 560, 600 y 640 ºC durante un tiempo de unión de 30, 45 y 60 min en una atmósfera en presencia y ausencia de gas argón. La unión por difusión es un proceso de soldadura entre metales distintos que puede ser aplicado a los materiales sin causar deformaciones físicas. Las probetas procesadas fueron preparadas también metalográficamente, examinadas por miscroscopía óptica, seguido de ensayos de microdureza Vickers para determinar el límite elástico. Se utilizó microscopía electrónica de barrido (SEM) y espectroscopía de energias dispersivas (EDS) para determinar los cambios en la composición y estudiar la influencia del argón como gas protector en la zona de transición. La influencia más importante se ha observado durante el proceso de difusión en estado sólido.PALABRAS CLAVE: Aleación Ti6Al4V; Argón gas protector; Difusión y unión; Unión de metales distintos; Unión en estado sólido ORCID ID: ORCID ID: Enes Akca

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Effect of laser surface remelting on the corrosion behavior of commercially pure titanium sheet

Cited by 145 publications

References 9 publications

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

Laser Welding of BTi-6431S High Temperature Titanium Alloy

Influencia del argón como gas protector en la difusión durante el proceso de unión de la aleación Ti6Al4V con el aluminio

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