Microstructure and mechanical properties of surface treated cast titanium with Nd:YAG laser

Dental Materials : Official Publication of the Academy of Dental Materials
Angéline Poulon-QuintinCaroline Bertrand

Abstract

To investigate the effect of laser surface treatment of cast titanium alloy on microstructure and mechanical properties. Dumbbell- and plate-shaped cast titanium specimens were prepared for mechanical testing and microstructure analysis. After the cast surfaces of each specimen were laser-treated using a dental Nd:YAG laser machine at 240 V and 300 V with and without argon gas shielding, tensile testing and microstructure analysis were conducted. Hardness depth profiles were also made from the cross-section of laser-treated cast specimens. Microstructural and chemical analysis were performed by means of the SEM, XRD, AES and WDS. The results of tensile testing and Vickers hardness depth profiling showed that laser treatment improved the mechanical properties. Bulk microstructure of as-cast titanium was mainly composed of α-grains with acicular and widmanstatten patterns. The laser melted zone was characterized by columnar beta grains. When the emission voltage of laser increased to 300V, a larger grain size was promoted. The XRD analysis indicated that the beta phase formation was clearly noticeable after laser surface treatment. Supplementary marked peaks of the TiO, TiO(2) and Ti(2)N were detected without argon gas shielding....Continue Reading

References

Sep 25, 2004·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·N Baba, I Watanabe
Dec 2, 2005·The Journal of Biological Chemistry·Gennadiy MoiseyevJian-Xing Ma
Jan 6, 2009·Dental Materials : Official Publication of the Academy of Dental Materials·Ikuya WatanabeKenneth S Kurtz
Sep 29, 2009·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Caroline Bertrand, Angeline Poulon-Quintin

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Citations

Dec 5, 2015·Biomaterials Research·Jun-Hee LeeMin-Ho Hong
Feb 18, 2015·Materials Science & Engineering. C, Materials for Biological Applications·L BolzoniE Gordo
Jan 30, 2014·Brazilian Dental Journal·Juliana Abdallah AtouiOsvaldo Luiz Bezzon
Jan 23, 2013·Brazilian Dental Journal·João Paulo Lyra e SilvaPaulo Cezar Simamoto Júnior
Apr 30, 2017·Lasers in Medical Science·Ahmed HindyFahimeh Sadat Tabatabaei

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