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Microstructure and corrosion behavior of differently heat-treated Ti-6Al-4V alloy processed by laser powder bed fusion of hydride-dehydride powder

https://doi.org/10.1016/j.corsci.2023.111495

Delpazir, Melody H.; Asherloo, Mohammadreza; Nasiri Khalil Abad, Sajjad; Thompson, Alaina; Guma, Victor; Bagi, Sourabh D.; Sreenivas, Keerthi Kumar; Paliwal, Muktesh; Terry, Jeff; Rollett, Anthony D.; et al (November 2023, Corrosion Science)

This study investigates the use of hydride-dehydride non-spherical Ti-6Al-4V powders in laser powder bed fusion process and the effects of post-heat-treatments on additively manufactured parts. As-built parts show anisotropic microstructure with α′ martensite and some β phases. Post heat-treated parts exhibit α + β phases, with characteristics dependent on the heat treatment. Heat treatment below β-transus leads to homogenized grain structures with improved corrosion resistance. Electrochemical analysis reveals a very stable corrosion rate due to faster formation of a protective passive layer aided by the fine-structured β phase. X-ray photoelectron spectroscopy examines corrosion behavior and film growth mechanism in saline water.
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Understanding process-microstructure-property relationships in laser powder bed fusion of non-spherical Ti-6Al-4V powder

Asherloo, Mohammadreza; Hwang, Junghyun; Leroux, Ryan; Wu, Ziheng; Fezzaa, Kamel; Paliwal, Muktesh; Rollett, Anthony D.; Mostafaei, Amir (April 2023, Materials Characterization)
Fatigue performance of laser powder bed fusion hydride-dehydride Ti-6Al-4V powder

https://doi.org/10.1016/j.addma.2022.103117

Asherloo, Mohammadreza; Wu, Ziheng; Heim, Mike; Nelson, Dave; Paliwal, Muktesh; Rollett, Anthony D.; Mostafaei, Amir (November 2022, Additive Manufacturing)

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Laser-beam powder bed fusion of cost-effective non-spherical hydride-dehydride Ti-6Al-4V alloy

https://doi.org/10.1016/j.addma.2022.102875

Asherloo, Mohammadreza; Wu, Ziheng; Delpazir, Melody H.; Ghebreiesus, Eyob; Fryzlewicz, Sara; Jiang, Runbo; Gould, Benjamin; Heim, Mike; Nelson, Dave; Marucci, Mike; et al (August 2022, Additive Manufacturing)

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