Bending Deformation of Pure Titanium Plate in CO2 Laser Forming

2007 ◽  
pp. 625-630
Author(s):  
Koichi Okuda ◽  
Y. Sugie ◽  
Masayuki Nunobiki
Keyword(s):  
Pure Titanium ◽  
Laser Forming ◽  
Titanium Plate ◽  
Bending Deformation

Bending Deformation of Pure Titanium Plate in CO2 Laser Forming

2007 ◽  
Vol 329 ◽  
pp. 625-630 ◽  
Author(s):  
Koichi Okuda ◽  
Y. Sugie ◽  
Masayuki Nunobiki
Keyword(s):  
Co2 Laser ◽  
Laser Power ◽  
Pure Titanium ◽  
Laser Spot ◽  
Laser Forming ◽  
Titanium Plate ◽  
Bending Angle ◽  
Spot Diameter ◽  
Bending Deformation ◽  
Laser Spot Diameter

This study deals with behaviour of bending deformation in CO2 laser forming process of titanium. CO2 laser forming technique was applied for a pure titanium plate with thickness of 1 mm to aim the development of new bending process. The experiments of laser forming were carried out with a CO2 laser machine. The bending angle and the temperature of workpiece were examined under the condition of various laser power, feed speed and laser spot diameter. Based on the experimental results, it was found that the bending deformation behaved greatly depending on the laser power and the laser spot diameter. The bending angle increased with an increase in the laser power. The bending direction tended to change from the laser irradiation side to its opposite side when the large laser spot diameter was applied.

Size-adjustable titanium plate for reconstruction of the sella turcica

1999 ◽  
Vol 91 (6) ◽  
pp. 1055-1057 ◽  
Author(s):  
Kazunori Arita ◽  
Kaoru Kurisu ◽  
Atsushi Tominaga ◽  
Fusao Ikawa ◽  
Koji Iida ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Sella Turcica ◽  
Pure Titanium ◽  
Clinical Use ◽  
Resonance Imaging ◽  
Titanium Plate ◽  
Content Type ◽  
Postoperative Magnetic Resonance Imaging ◽  
Closed Position ◽  
Fine Print

✓ A size-adjustable plate constructed of pure titanium is proposed for use in the reconstruction of the sella turcica. The plate is composed of two semicircular pieces that are connected by a hinge located at the top of the plate. Using an applicator, the plate is inserted into the sella turcica in a closed position. The same applicator is then used to open and secure the plate. The titanium causes minimal ferromagnetic artifacts on postoperative magnetic resonance imaging.Preliminary findings indicate a possibie clinical use for this plate in the reconstruction of the sella turcica when no suitable piece of bone is available.

Mechanical Interlocking of Titanium and Steel Using Friction Stir Forming

2018 ◽  
Vol 792 ◽  
pp. 59-64
Author(s):  
Hamed Mofidi Tabatabaei ◽  
Shun Orihara ◽  
Tadashi Nishihara ◽  
Takahiro Ohashi
Keyword(s):  
Steel Sheet ◽  
Pure Titanium ◽  
Mechanical Interlocking ◽  
Titanium Plate ◽  
Screw Hole ◽  
Microstructural Observation ◽  
Friction Stir ◽  
Hardness Tests ◽  
Dissimilar Alloys ◽  
Novel Method

This study presents a novel method for mechanically interlocking dissimilar alloys of pure titanium with steel through using the principles of friction stir forming (FSF) technique. In present study, titanium plate is placed on top of a steel sheet containing a screwed hole. FSF is conducted on top of the titanium alloy, which produces sufficient heat to plasticize the alloy. This results in a flow of titanium into the screw hole in the steel, due to the plastic deformation, thereby mechanically interlocking titanium with the steel. The mechanical properties of the developed interlock are investigated through tensile and hardness tests and microstructural observation.

Friction behavior of network-structured CNT coating on pure titanium plate

2015 ◽  
Vol 357 ◽  
pp. 721-727 ◽  
Author(s):  
Junko Umeda ◽  
Bunshi Fugetsu ◽  
Erika Nishida ◽  
Hirofumi Miyaji ◽  
Katsuyoshi Kondoh
Keyword(s):  
Pure Titanium ◽  
Titanium Plate ◽  
Friction Behavior

scholarly journals Characteristics of Welds of Pure Titanium Plate Using Ultrasonic Attenuation

2013 ◽  
Vol 33 (2) ◽  
pp. 205-211 ◽  
Author(s):  
Sang-Won Seon ◽  
Won Yi ◽  
Hee-Dong Park ◽  
Yeong-Tak Hwang
Keyword(s):  
Ultrasonic Attenuation ◽  
Pure Titanium ◽  
Titanium Plate

scholarly journals New Approach to Produce a Nanocrystalline Layer on Surface of a Large Size Pure Titanium Plate

Coatings ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 430
Author(s):  
Yuzhu Fu ◽  
Ge Wang ◽  
Jing Gao ◽  
Quantong Yao ◽  
Weiping Tong
Keyword(s):  
Pure Titanium ◽  
Grain Morphology ◽  
Optical Microscope ◽  
Surface Mechanical Attrition Treatment ◽  
Titanium Plate ◽  
Hardness Tester ◽  
Large Size ◽  
Transmission Electron ◽  
Average Grain Size ◽  
Nanocrystalline Layer

It was demonstrated that the mechanical shot peening (MSP) technique was a viable way to obtain a nanocrystalline layer on a large size pure titanium plate due to the MSP provided for severe plastic deformation (SPD) of surface high velocity balls impacting. The MSP effects of various durations in producing the surface nanocrystalline layer was characterized by optical microscope (OM), X-ray diffraction (XRD), transmission electron microscope (TEM), and Vickers micro-hardness tester. The results showed that the thickness of the SPD layer gradually increased with the MSP processing time increase, but saturated at 230 μm after 30 min. The average grain size was refined to about 18.48 nm in the nanocrystalline layer. There was equiaxed grain morphology with random crystallographic orientation in the topmost surface. By comparing with the nanocrystalline layer, acquired by surface mechanical attrition treatment (SMAT), the microstructure and properties of the nanocrystalline layer acquired by MSP was evidently superior to that of the SMAT, but the production time was cut to about a quarter of the time used for the SMAT method.

scholarly journals In Situ Digital Image Correlation Observations of Laser Forming

Metals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 17 ◽  
Author(s):  
Herman Fidder ◽  
Joris P. J. Admiraal ◽  
Václav Ocelík ◽  
Jeff Th. M. De Hosson
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Heat Affected Zone ◽  
Laser Power ◽  
Pure Titanium ◽  
Processing Parameters ◽  
Image Correlation ◽  
Laser Forming ◽  
Bending Angle

In this study experimental and modelling methods are used to examine the microstructural and bending responses of laser-formed commercially pure titanium grade 2. The in situ bending angle response is measured for different processing parameters utilizing 3D digital image correlation. The microstructural changes are observed using electron backscatter diffraction. Finite element modelling is used to analyse the heat transfer and temperature field inside the material. It has been proven that the laser bending process is not only controlled by processing parameters such as laser power and laser beam scanning speed, but also by surface absorption. Grain size appears to have no influence on the final bending angle, however, sandblasted samples showed a considerably higher final bending angle. Experimental and simulation results suggest that the laser power has a larger influence on the final bending angle than that of the laser transverse speed. The microstructure of the laser heat-affected zone consists of small refined grains at the top layer followed by large elongated grains. Deformation mechanisms such as slip and twinning were observed in the heat-affected zone, where their distribution depends on particular processing parameters.

The Effect of Initial Microstructure on the Dynamic Mechanical Behavior of Titanium Plate at Different Strain Rates

2013 ◽  
Vol 477-478 ◽  
pp. 1298-1302
Author(s):  
Mian Li ◽  
Bo Long Li ◽  
Tong Bo Wang ◽  
Zuo Ren Nie
Keyword(s):  
Strain Rate ◽  
Pure Titanium ◽  
Boundary Structure ◽  
Strengthening Effect ◽  
Titanium Plate ◽  
Dislocation Boundary ◽  
Dynamic Mechanical ◽  
Dynamic Mechanical Behavior ◽  
Commercial Pure Titanium ◽  
Gleeble 3500

The dynamic mechanical property and microstructure evolution of commercial pure titanium with initial lamellar dislocation boundary structures were studied at different strain rate compression. The experiments were conducted to the cylindrical specimens using Gleeble-3500 thermal mechanical simulation machine at room temperature. With increasing of the strain rate, strain rate strengthening effect was found in the material. New dislocation boundary structures along impact direction were generated which perpendicular to initial dislocation boundary. Then the S bands boundary structure was formed by interaction between new and initial dislocations. It can be supposed that initial dislocation boundary are sheared and kinked by new dislocation slipping.

scholarly journals Effect of Heat Treatment and Transformation on Bending Angle in Laser Forming of Titanium Foils

2007 ◽  
Vol 344 ◽  
pp. 243-250
Author(s):  
Masaaki Otsu ◽  
Yasuhiro Ito ◽  
Akira Ishii ◽  
Hideshi Miura ◽  
Kazuki Takashima
Keyword(s):  
Heat Treatment ◽  
Grain Size ◽  
Laser Power ◽  
Pure Titanium ◽  
Foil Thickness ◽  
Laser Forming ◽  
Bending Angle ◽  
History Of ◽  
Yvo4 Laser ◽  
Titanium Foils

Pure titanium foils were bent by laser forming and the effect of c-d transformation and history of heat treatment of specimen on bending angle was investigated. The thickness of specimens was changed from 40 to 100om, the length of them was 20mm and the width of them was 10mm. The specimens were annealed at 600-1100oC for 30 minutes in argon atmosphere. A 20W YVO4 laser was employed and laser power was changed from 2 to 16W. From the experimental results, when laser power was increased, bending angle also increased and it was dramatically changed at the laser powers occurring c-d transformation and melting. Bending angle increased as grain size increased and it jumped up when grain size exceeded the foil thickness and then became constant. Bending angle decreased by annealing after forming and degree of decrease was greater when the annealing temperature before forming was lower.

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