Corrosion behavior of additively manufactured Ti-6Al-4V parts and the effect of post annealing

Ettefagh, Ali Hemmasian; Zeng, Congyuan; Guo, Shengmin; Raush, Jonathan

doi:10.1016/j.addma.2019.05.011

Cited by 48 publications

(33 citation statements)

References 35 publications

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“…[1] Thus, even if the general microstructure of SLM and forged samples is not the same, the corrosion behavior seems to be mainly dependent on the morphology and the type of constituent phase which give a similar effect on the corrosion resistance. It can be concluded that the corrosion performance of SLM in the specific heat-treated condition is comparable to that of forged samples, as observed also by Hammasian Ettefagh et al [42] .…”

Section: 5% Naclsupporting

confidence: 82%

Wear and Corrosion Characterization of a Ti–6Al–4V Component for Automotive Applications: Forging versus Selective Laser Melting Technologies

Cecchel¹,

Montesano

Cornacchia

2022

Adv Eng Mater

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Selective laser melting (SLM) is applied to manufacture a Ti-6Al-4V conrod, an engine component, in order to reduce the weight respect to the original version produced by forging with the same alloy. The weight reduction is achieved through a topological optimization and is about 15%. The article focuses on an experimental study of titanium SLM and hot forging components based on evaluation and comparison of properties relevant for automotive applications: metallurgy, corrosion behavior, and wear resistance. The microstructure is duplex, composed of equiaxial α and β grains for both the technologies analyzed; different morphology and distribution of α and β phases are observed as expected. The analysis on corrosion and wear resistance against 100Cr6 highlights very similar properties for the two technologies. Finally, this study confirms that Ti-6Al-4V made by SLM can substitute the traditional forging technologies in the transport field for the properties here studied.

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Section: 5% Naclsupporting

confidence: 82%

Wear and Corrosion Characterization of a Ti–6Al–4V Component for Automotive Applications: Forging versus Selective Laser Melting Technologies

Cecchel¹,

Montesano

Cornacchia

2022

Adv Eng Mater

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“…For AM, a limited choice of alloys is used due to prototyping with specific properties [4]. The most widely used alloy for AM is Ti-6Al-4V [1,[5][6][7][8][9][10][11][12], especially concerning fatigue properties [13][14][15], due to wide use in medical, aircraft, aerospace and automotive industries belonging to high-value complex parts requiring only limited production volumes.…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing with Superduplex Stainless Steel Wire by CMT Process

Lervåg

Sørensen

Robertstad

et al. 2020

Metals

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For many years, the oil and gas industry has utilized superduplex stainless steels due to their high strength and excellent corrosion resistance. Wire arc additive manufacturing (WAAM) was used with superduplex filler wire to create walls with different heat input. Due to the multiple heating and cooling cycles during layer deposition, brittle secondary phases may form such as intermetallic sigma (σ) phase. By inspecting deposited walls within wide range of heat inputs (0.40–0.87 kJ/mm), no intermetallic phases formed due to low inter-pass temperatures used, together with the high Ni content in the applied wire. Lower mechanical properties were observed with high heat inputs due to low ferrite volume fraction, precipitation of Cr nitrides and formation of secondary austenite. The walls showed good toughness values based on both Charpy V-notch and CTOD (crack tip opening displacement) testing.

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“…This is the formation mechanism of the SLM-produced Ti6Al4V3Cu alloys’ microstructure, shown in Figure 3 , while the Ti6Al4V3Cu alloys obtained by casting, were processed by a continuous casting process, where liquid metal was solidified with a specific cooling rate, thus, leading to different microstructures, such as primary α phase and α coarse lamellae (transferred from β). According to previous reports, grain refinement can increase electron activity at grain boundaries, which can help the rapid formation of stable passive films, improving corrosion resistance [ 33 ]. Dai et al [ 34 ] proved that the size of the grain has a significant influence on the corrosion rate, and it is proposed that the corrosion rate and grain size show a positive correlation.…”

Section: Discussionmentioning

confidence: 99%

Corrosion Resistance of Selective Laser Melted Ti6Al4V3Cu Alloy Produced Using Pre-Alloyed and Mixed Powder

Huang

Fan

et al. 2022

Materials

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Metallic elemental powder mixture and pre-alloyed metallic powder are both frequently used powder feedstock in the additive manufacturing process. However, little research has been conducted to compare the corrosion behavior of selective laser melting (SLM) alloys, fabricated by pre-alloyed metallic powder and mixed metallic powder. Hence, it is important to investigate the corrosion behavior of SLMed alloys, as well as the corresponding cast ingot, with the aim to better understand the feasibility of designing new materials. In this work, the SLM-produced Ti6Al4V3Cu alloys were manufactured using a metallic elemental powder mixture and pre-alloyed metallic powder, respectively. The corrosion behavior of the different Ti6Al4V3Cu alloys was investigated in following electrochemical tests and ion release measurements. The results showed that the Ti6Al4V3Cu alloy prepared by pre-alloyed metallic powder showed better corrosion resistance than that produced from mixed metallic powder. Moreover, the SLM-produced Ti6Al4V3Cu alloys performed significantly better in corrosion resistance than the cast Ti6Al4V3Cu. The results are expected to achieve a better understanding of the feasibility of designing new materials using mixed powders, contributing to reducing development costs and cycles.

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Corrosion behavior of additively manufactured Ti-6Al-4V parts and the effect of post annealing

Cited by 48 publications

References 35 publications

Wear and Corrosion Characterization of a Ti–6Al–4V Component for Automotive Applications: Forging versus Selective Laser Melting Technologies

Wear and Corrosion Characterization of a Ti–6Al–4V Component for Automotive Applications: Forging versus Selective Laser Melting Technologies

Additive Manufacturing with Superduplex Stainless Steel Wire by CMT Process

Corrosion Resistance of Selective Laser Melted Ti6Al4V3Cu Alloy Produced Using Pre-Alloyed and Mixed Powder

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