http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Daniil V. Panov (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
Laser Polishing of Nickel-Titanium Shape Memory Alloy Produced via Laser Powder Bed Fusion
Stanislav V. Chernyshikhin,Daniil V. Panov,Tran Van Tuan,Dmitriy Yu. Ozherelkov,Vadim A. Sheremetyev,Igor V. Shishkovsky 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.10
Laser Powder Bed Fusion (LPBF) is considered a promising technology for NiTi intermetallic components production. However, different defects such as near-surface porosity inherent to the process are limiting the standardization and widespread of the technology due to the deterioration of the mechanical properties. In this work, a comprehensive study was implemented to reduce the near-surface porosity by the laser polishing of additively manufactured samples from pre-alloyed NiTi powder by LPBF. Different laser polishing process conditions were employed for the treatment of the near-surface region. Results have shown that the most effective treatment aimed at porosity healing occurs at a laser power of 540 W, a scanning speed of 25 mm/s, a hatch spacing of 200 μm, and a laser spot of 500 μm. The phase identification and martensite-austenite transformation temperatures characterization were carried out before and after the laser polishing of the NiTi samples; the influence of the laser polishing on the functional properties of the material was demonstrated. It was shown that the application of required linear energy density for successful healing of the near-surface porosity leads to the local solutionizing effect. Additionally, electrochemical studies were carried out in Hank's solution and demonstrated that the corrosion resistance was improved after laser polishing.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
