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 : Pałka (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Vivek Gaur,S. Mahendra Perumal,Faizur Rahmaan,Łukasz Pałka 대한악안면성형재건외과학회 2021 Maxillofacial Plastic Reconstructive Surgery Vol.43 No.-
Background: In the field of craniofacial tumor surgery, an adequately performed excision, despite being a lifesaving procedure, is only a first step to successful treatment. During such a procedure, the main goal is tocompletely remove the lesion, paying less attention to factors contributing to future rehabilitation possibilities. Onety 2of the possibilities for prosthetic rehabilitation of such cases is utilizing one-piece implants with bicorticalanchorage. Case presentation: This case report presents a case of a 48-year-old patient with oral squamous cell carcinoma(OSCC). The treatment protocol consisted of radical surgery to remove the tumor, and intraoral and extraoralrehabilitation with a single framework prosthesis anchored with one-piece implants. Moreover, the intraoralstomatognathic deformity was corrected with a fixed implant-retained prosthesis, and the extraoral defect wascovered with a removable epithesis. Conclusions: The use of one-piece implants with bicortical anchorage may be an additional tool in reconstructingmaxillofacial defects. Properly executed treatment may improve the esthetics, speech, masticatory function, musclesupport, and the overall quality of life of patients with extensive defects in the maxillofacial region.
-
Effect of Various SPD Techniques on Structure and Superplastic Deformation of Two Phase MgLiAl Alloy
Jan Dutkiewicz,Piotr Bobrowski,Stanislav Rusz,Ondrej Hilser,Tomasz A. Tański,Wojciech Borek,Marek Łagoda,Paweł Ostachowski,Paweł Pałka,Grzegorz Boczkal,Dariusz Kuc,Tomasz Mikuszewski 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.5
MgLiAl alloy containing 9 wt% Li and 1.5% Al composed of hexagonal α and bcc β phases was cast under protecting atmosphereand hot extruded. Various methods of severe plastic deformation were applied to study their effect on structure and grainrefi nement. Rods were subjected to 1–3 passes of Twist Channel Angular Pressing TCAP (with helical component), cycliccompression to total strain ε = 5 using MAXStrain Gleeble equipment, both performed at temperature interval 160–200 °Cand, as third SPD method, KOBO type extrusion at RT. The TCAP pass resulted in grain refi nement of α phase from 30 μmdown to about 2 μm and that of β phase from 12 to 5 μm. Maxstrain cycling 10 × up to ε = 5 led to much fi ner grain size of300 nm. KOBO method performed at RT caused average grain size refi nement of α and β phases down to about 1 μm. Hardnessof alloy decreased slightly with increasing number of TCAP passes due to increase of small void density. It was higherafter MAXStrain cycling and after KOBO extrusion. TEM studies after TCAP passes showed higher dislocation density inthe β region than in the α phase. Crystallographic relationship (001) α|| (110) β indicated parallel positioning of slip planesof both phases. Electron diff raction technique confi rmed increase of grain misorientation with number of TCAP passes. Stress/strain curves recorded at temperature 200 °C showed superplastic forming after 1st and 3rd TCAP passes with bettersuperplastic properties due to higher elongation with increasing number of passes. Values of strain rate sensitivity coeffi cientm were calculated at 0.29 after 3rd TCAP pass for strain rate range 10 −5 to 5 × 10 −3 s −1 . Deformation by MAXStrain cyclingcaused much more effective grain refi nement with fi ne microtwins in α phase. Superplastic deformation was also observed inalloy deformed by KOBO method, however the value of m = 0.21 was obtained at lower temperature of deformation equal to160 °C and deformation rate in the range 10 −5 to 5 × 10 −3 . Tensile samples deformed superplastically showed grain growthand void formation caused by grain boundary slip. Summarizing, all methods applied resulted in suffi cient grain refi nementto obtain the effect of superplastic deformation for alloys of two phase α + β structure.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
