Development of a Castable, Free-Machining Titanium Alloy

2011 ◽  
Vol 690 ◽  
pp. 3-6 ◽  
Author(s):  
Judith Laukart ◽  
Carsten Siemers ◽  
Joachim Rösler
Keyword(s):  
Titanium Alloy ◽  
Alloying Elements ◽  
Ti Alloys ◽  
Cp Ti

The addition of La to cp-Ti or Ti alloys, like Ti 6Al 4V, leads to the formation of short-breaking chips. Free-machinability is given by elementary La particles in the Ti matrix. The new alloy Ti 6Al 2Fe 1Mo 0.9La 0.5Cu was developed out of the Ti 6Al 4V alloy and exhibits free-machi­nability. However, this alloy offers poor castability due to the formation of hot cracks. Thermocalc® simulations dis­covered that Fe and Cu are broadening the solidification interval of the new alloy, which favors the formation of hot cracks. Therefore, the suitability of other β-stabilizing, like Mn and Cr alloying elements was investigated.

scholarly journals Criteria for fast and selective α precipitation at β grain boundaries in Ti-alloys Consequence for in-service microstructures

2020 ◽  
Vol 321 ◽  
pp. 12040
Author(s):  
Tao Liu ◽  
Lionel Germain ◽  
Julien Teixeira ◽  
Elisabeth Aeby-Gautier ◽  
Nathalie Gey
Keyword(s):  
Titanium Alloy ◽  
Grain Boundaries ◽  
Simulation Study ◽  
Variant Selection ◽  
Industrial Products ◽  
Ti Alloys ◽  
Electron Backscatter

The potential for β grain boundaries (GBs) to give rise to large Widmanstätten colonies was determined through the observation of a large amount of precipitates at β GBs in a β-metastable titanium alloy using electron backscatter imaging and diffraction. The most critical boundaries are those which transform early and where a type of Variant Selection (VS) called double Burgers VS occurs. This mechanisms take place at ‘special’ β boundaries misoriented so that an α precipitate can be related to both grains through the Burgers relation. It was shown that the most critical GBs have a disorientation at an angle of less than 10° from 49.5°/<110> or 60°/<110>. A simulation study allowed those boundaries to be quantifed in crystallographic textures typical of industrial products. Those texture have then been discussed as a function of their potential to form large Widmanstätten colonies.

β → β + α Isothermal Phase Transformation in Ti17 Titanium Alloy: Chemical Composition and Crystallographic Aspect

2011 ◽  
Vol 172-174 ◽  
pp. 396-401 ◽  
Author(s):  
Moukrane Dehmas ◽  
Julien Kovac ◽  
Benoît Appolaire ◽  
Elisabeth Aeby-Gautier ◽  
Benoit Denand ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Phase Transformation ◽  
Chemical Composition ◽  
Transformation Temperature ◽  
Isothermal Transformation ◽  
Alloying Elements ◽  
Crystallographic Aspect ◽  
Thermocalc Software

The partitioning of alloying elements between a and b phases was measured at different steps of the isothermal transformation at 710 and 610°C in Ti 17 alloy using EDX analyzer in the TEM. In addition, the transformation crystallography was determined. No differences in substitution elements were observed for a same transformation temperature in the a phase, however the composition varied with the transformation temperature. For the partial transformed specimens, gradient in composition were obtained. Results are compared to calculated compositions using ThermoCalc software and Saunders database.

Effects of multiple trace alloying elements on the microstructure and properties of Cu-4 wt% Ti alloys

2017 ◽  
Vol 707 ◽  
pp. 392-398 ◽  
Author(s):  
Huan Wei ◽  
Yanchao Cui ◽  
Huiqi Cui ◽  
Yinghui Wei ◽  
Lifeng Hou
Keyword(s):  
Alloying Elements ◽  
Microstructure And Properties ◽  
Ti Alloys

The Development of the Low-Cost Titanium Alloy Containing Cr and Mn Alloying Elements

2013 ◽  
Vol 45 (4) ◽  
pp. 1761-1766 ◽  
Author(s):  
Kailiang Zhu ◽  
Na Gui ◽  
Tao Jiang ◽  
Ming Zhu ◽  
Xionggang Lu ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Low Cost ◽  
Alloying Elements

Current Research Situation and Development of Titanium Alloy in China in Recent Five Years

2005 ◽  
Vol 475-479 ◽  
pp. 563-568
Author(s):  
Yong Qing Zhao ◽  
Lian Zhou
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Titanium Alloys ◽  
High Strength ◽  
Basic Theory ◽  
Ti Alloys ◽  
Developing Directions ◽  
Research Situation

China pays great attentions to the development of titanium alloys and their basic theory because of their excellent properties. New titanium alloys and their new basic theories developed in China in recent five years were reviewed, for example, high temperature Ti alloys, burn resistant titanium alloys, high strength and middle strength titanium alloys and so on. The developing directions in the next 5 to 10 years were forecast.

scholarly journals Aluminum- and Vanadium-free Titanium Alloys for Medical Applications

2020 ◽  
Vol 321 ◽  
pp. 05008
Author(s):  
Fabian Haase ◽  
Carsten Siemers ◽  
Lina Klinge ◽  
Cheng Lu ◽  
Patric Lang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Titanium Alloys ◽  
Human Body ◽  
Alloying Elements ◽  
Medical Applications ◽  
Good Corrosion Resistance ◽  
Cp Ti ◽  
Strength And Ductility

CP-Ti, Ti 6A l 4V (ELI), and Ti 6Al 7Nb are often used for manufacturing osteosynthesis products or implants. However, researches have revealed that Al and V can have detrimental effects on the human body. Therefore, several Al- and V-free near-α and (α+β) titanium alloys have been developed on the basis of CP-Ti Grade 4+ (Ti 0.4O 0.5Fe 0.08C). They should possess similar or better mechanical properties than Ti 6Al 4V (ELI) combined with an improved biocompatibility and good corrosion resistance. O, C, Fe, Au, Si, Nb, or Mo have been used as alloying elements, which are either already present in the human body or are biocompatible. Several of the studied alloys show a strength and ductility fulfilling the requirements of Ti 6Al 4V ELI as specified in ASTM F136. For instance, Ti 0.44O 0.5Fe 0.08C 2.0Mo exhibits a YTS of approx. 1005 MPa, an UTS of approx. 1015 MPa, and an elongation at rupture of at least 17%. Therefore, one or more of the studied alloys are promising candidates for replacing Ti 6Al 4V ELI in osteosynthesis and implant applications.

scholarly journals STUDY OF A α+β-TITANIUM ALLOY BASED ON A SYSTEM OF Ti–Al–Sn–Zr–Si–β-STABILIZING ALLOYING ELEMENTS

2020 ◽  
pp. 30-37
Author(s):  
E.N. Kablov ◽  
◽  
O.S. Kashapov ◽  
P.N. Medvedev ◽  
T.V. Pavlova ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Alloying Elements
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