scholarly journals Tribological Behavior between Commercially Pure Titanium and High Speed Steel at High Temperature

2001 ◽  
Vol 87 (8) ◽  
pp. 536-543
Author(s):  
Kazuhiro TAKAHASHI ◽  
Tsuyoshi INOUE ◽  
Shigeru UCHIDA
2007 ◽  
Vol 539-543 ◽  
pp. 3678-3683
Author(s):  
Ming Jen Tan ◽  
X.J. Zhu ◽  
S. Thiruvarudchelvan ◽  
K.M. Liew

This work reports the influence of oxidation on the superplasticity of commercially pure titanium at high temperatures. Uniaxial tensile tests were conducted at temperatures in the range 600-800°C with an initial strain rate of 10s-1 to 10s-3. This study shows that oxidization at the surface of the alloy causes oxide film on the surface of commercially pure titanium alloy, and the thickness of oxide film increase with increasing exposure time and temperature. XRD analysis shows that the oxide film consists of TiO2. Because this oxide film is very brittle, it can induce clefts and degrade the ductility of the titanium at high temperatures. The mechanism of the initial clefts was investigated and a model for the cleft initiation and propagation during high temperature tensile test was proposed.


Alloy Digest ◽  
1959 ◽  
Vol 8 (4) ◽  

Abstract MST 3A1-2.5V is a highly weldable titanium alloy having greater room and elevated temperature strength with greater flarability than commercially pure titanium. It is also age-hardenable. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and bend strength as well as creep and fatigue. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Ti-18. Producer or source: Mallory-Sharon Metals Company.


Alloy Digest ◽  
1971 ◽  
Vol 20 (9) ◽  

Abstract CRUCIBLE A-70 is a grade of commercially pure titanium that is used where higher strength is required than is achieved with grade A-55. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and compressive, shear, and bearing strength as well as fracture toughness, creep, and fatigue. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ti-63. Producer or source: Crucible Specialty Metals Division, Colt Industries.


Alloy Digest ◽  
1972 ◽  
Vol 21 (6) ◽  

Abstract Ti-35A and Ti-50A are commercially pure titanium grades with guaranteed minimum tensile strengths of 35000 psi and 50,000 psi, respectively. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ti-65. Producer or source: Titanium Metals Corporation of America.


Alloy Digest ◽  
2010 ◽  
Vol 59 (5) ◽  

Abstract TIMETAL 65A is a general purpose grade of commercially pure titanium that has excellent corrosion resistance to highly oxidating to mildly reducing environments, including chlorides, and an excellent strength-to-weight ratio. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fatigue. It also includes information on high temperature performance as well as forming and heat treating. Filing Code: TI-147. Producer or source: Timet.


Author(s):  
V.V. Skripnyak ◽  
◽  
K.V. Iokhim ◽  
V.A. Skripnyak ◽  
◽  
...  

In this work, the effect of a triaxiality stress state on the mechanical behavior and fracture of commercially pure titanium VT1-0 (Grade 2) in the range of strain rates from 0.1 to 1000 s−1 is studied. Tensile tests are carried out using a servo-hydraulic testing machine Instron VHS 40 / 50-20 on flat specimens with a constant cross-sectional area and on flat specimens with a notch. To study the effect of the complex stress state on the ultimate deformation before fracture, the samples with the notch of various radii (10, 5, 2.5 mm) are used in the experiments. Phantom V711 is employed for high-speed video registration of specimen’s deformation. Deformation fields in a working part of the sample are investigated by the digital image correlation method. It is shown that the effect of the strain rate on the ultimate deformations before fracture has a nonmonotonic behavior. An analysis of strain fields in the working part of the samples shows that the degree of uniform deformation of the working part decreases with an increase in the strain rate. At strain rates above 1000 s−1, the shear bands occur at the onset of a plastic flow. Commercially pure titanium undergoes fracture due to the nucleation, growth, and coalescence of damages in the bands of localized plastic deformation oriented along the maximum shear stresses. The results confirm that the fracture of commercially pure titanium exhibits ductile behavior at strain rates varying from 0.1 to 1000 s−1, at a triaxiality stress parameter in the range of 0.333 ≤ η <0.467, and at a temperature close to 295 K.


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