scholarly journals Study on the Microstructure Properties of Titanium Metal Crown Base Laser Rapid Forming

2016 ◽  
Author(s):  
Yulei Li ◽  
Jinjun Tang ◽  
Yuelai Dai ◽  
Xiaoyu Jin ◽  
Qun Wang
Keyword(s):  
Titanium Metal ◽  
Laser Rapid Forming

scholarly journals Machining of Titanium Metal Matrix Composites: Progress Overview

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5011
Author(s):  
Cécile Escaich ◽  
Zhongde Shi ◽  
Luc Baron ◽  
Marek Balazinski
Keyword(s):  
Tool Wear ◽  
Tool Life ◽  
Wear Mechanisms ◽  
Metal Matrix ◽  
Dust Emission ◽  
Cutting Speed ◽  
Matrix Composites ◽  
Titanium Metal ◽  
Machining Processes ◽  
Tool Wear Mechanisms

The TiC particles in titanium metal matrix composites (TiMMCs) make them difficult to machine. As a specific MMC, it is legitimate to wonder if the cutting mechanisms of TiMMCs are the same as or similar to those of MMCs. For this purpose, the tool wear mechanisms for turning, milling, and grinding are reviewed in this paper and compared with those for other MMCs. In addition, the chip formation and morphology, the material removal mechanism and surface quality are discussed for the different machining processes and examined thoroughly. Comparisons of the machining mechanisms between the TiMMCs and MMCs indicate that the findings for other MMCs should not be taken for granted for TiMMCs for the machining processes reviewed. The increase in cutting speed leads to a decrease in roughness value during grinding and an increase of the tool life during turning. Unconventional machining such as laser-assisted turning is effective to increase tool life. Under certain conditions, a “wear shield” was observed during the early stages of tool wear during turning, thereby increasing tool life considerably. The studies carried out on milling showed that the cutting parameters affecting surface roughness and tool wear are dependent on the tool material. The high temperatures and high shears that occur during machining lead to microstructural changes in the workpiece during grinding, and in the chips during turning. The adiabatic shear band (ASB) of the chips is the seat of the sub-grains’ formation. Finally, the cutting speed and lubrication influenced dust emission during turning but more studies are needed to validate this finding. For the milling or grinding, there are major areas to be considered for thoroughly understanding the machining behavior of TiMMCs (tool wear mechanisms, chip formation, dust emission, etc.).

Effect of starting powder grade on sintering and properties of PM titanium metal matrix composites

2009 ◽  
Vol 52 (4) ◽  
pp. 322-328 ◽  
Author(s):  
I. Montealegre-Melendez ◽  
E. Neubauer ◽  
H. Danninger
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Composites ◽  
Titanium Metal

Preparation, Decomposition and Characterizations of Bangka - Indonesia Ilmenite (FeTiO3) Derived by Hydrothermal Method Using Concentrated NaOH Solution

2012 ◽  
Vol 535-537 ◽  
pp. 750-756 ◽  
Author(s):  
Latifa Hanum Lalasari ◽  
Florentinus Firdiyono ◽  
Akhmad Herman Yuwono ◽  
Sri Harjanto ◽  
Bambang Suharno
Keyword(s):  
Intermediate Phase ◽  
Hydrothermal Process ◽  
Sodium Titanate ◽  
Titanium Metal ◽  
White Pigment ◽  
Naoh Solution ◽  
Metal Titanium ◽  
Tio2 Pigment ◽  
Impurity Elements ◽  
Operation Cost

Ilmenite is an economically important and interesting mineral. It is found as a by-product of tin mining in Bangka Indonesia. This mineral has can be used as the source of making titanium metal, titanium dioxide (TiO2) pigment and material for photo catalysts. However, the synthesis of TiO2 from ilmenite using both sulfate and chloride processes still has faced a major problem to obtain white pigment of high purity and lower operation cost. This is mainly due to Fe2O3 impurity in TiO2 pigment which cannot be easily decomposed. Therefore, this study is aimed at investigating the possibility of using Bangka ilmenite mineral to obtain TiO2 pigments and photocatalysts. For this purpose, , sodium hydroxide (NaOH) was used as decomposition solution via hydrothermal process in a teflon-lined autoclave equipment. The characterization results indicated that Bangka ilmenite contains a significant TiO2 level of more than 30 %, although there still remains some other impurities. Upon decomposition of dissolution using NaOH, was decrease in impurity elements down to 60 %. The decomposition process of ilmenite was optimum at NaOH concentration of 10 M where the ilmenite decomposes to form an intermediate phase of sodium titanate with the morphological shape of fine threads.

scholarly journals Howse II cemented titanium metal-backed acetabular cupsPoor 10-year results in 107 hips

2003 ◽  
Vol 74 (4) ◽  
pp. 397-403 ◽  
Author(s):  
Rama Mohan ◽  
Peter Grigoris ◽  
Fiona Johnstone ◽  
David Hamblen
Keyword(s):  
Titanium Metal

The influences of processing parameters on forming characterizations during laser rapid forming

2003 ◽  
Vol 360 (1-2) ◽  
pp. 18-25 ◽  
Author(s):  
Yanmin Li ◽  
Haiou Yang ◽  
Xin Lin ◽  
Weidong Huang ◽  
Jianguo Li ◽  
...  
Keyword(s):  
Processing Parameters ◽  
Laser Rapid Forming
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