3D 프린팅법으로 제조한 티타늄 시편의 물성 평가
Evaluation of Physical Properties of Titanium Specimen Fabricated by 3D Printing Technique
오윤정, 석수황, 이상혁, 김광만, 권재성, 임범순,
소속 상세정보
오윤정 ( Oh Yun-Jeong ) - 서울대학교 치의학대학원 치과생체재료과학교실
석수황 ( Seok Soo-Hwang ) - 서울대학교 치의학대학원 치과생체재료과학교실
이상혁 ( Lee Sang-Hyeok ) - 서울대학교 치의학대학원 치과생체재료과학교실
김광만 ( Kim Kwang-Mahn ) - 연세대학교 치과대학 치과생체재료공학교실
권재성 ( Kwon Jae-Sung ) - 연세대학교 치과대학 치과생체재료공학교실
임범순 ( Lim Bum-Soon ) - 서울대학교 치의학대학원 치과생체재료과학교실
KMID : 1035320160430010029
Abstract
The interest of the additive manufacturing technology, commonly called 3D printing, is rapidly increasing. Selective laser sintering (SLS) is the one of the method for 3D printing that has potential to produce metallic prostheses in dentistry. The purpose of this study was to evaluate physical properties of titanium specimen fabricated by SLS for dental implant system. Specimens were fabricated from Ti6Al4V alloy powder with median particle size (D50) of 34 μm. The SLS 3D printing was carried out using YAG laser with wavelength of 1075 nm with power of 190 W, and thickness of each layer was 30 μm. Machined specimens with sandblasting treatment were used as control group. Density, porosity, yield strength (30o compression), elastic modulus and fatigue limit were estimated. Density measurement and microCT analysis gave valuable informations about impurity inclusions and manufacturing defects. Yield strength and elastic modulus of 3D printing dense specimen showed similar value with the machined specimens. However, fatigue limit of 3D printing dense specimens was significantly lower than the machined specimen. 3D printing porous specimen showed lower yield strength and elastic modulus than the 3D printing dense specimens. Before 3D printing porous dental prosthesis application in clinic, fatigue limit should be evaluated carefully.
키워드
3D Printing; Titanium Alloy; SLS; MicroCT; Elastic Modulus; Fatigue Limit
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