Tuning thermal expansion by a continuing atomic rearrangement mechanism in a multifunctional titanium alloy

2020 ◽  
Author(s):  
D.L. Gong ◽  
H.L. Wang ◽  
E.G. Obbard ◽  
S.J. Li ◽  
R. Yang ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Titanium Alloy ◽  
Rearrangement Mechanism ◽  
Atomic Rearrangement

Characterization of Phase Transitions Occurring in Solution Treated Ti-15Mo during Heating by Thermal Expansion and Electrical Resistance Measurements

2016 ◽  
Vol 879 ◽  
pp. 2318-2323 ◽  
Author(s):  
Pavel Zháňal ◽  
Petr Harcuba ◽  
Michal Hájek ◽  
Jana Šmilauerová ◽  
Jozef Veselý ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Titanium Alloy ◽  
Phase Transitions ◽  
Electrical Resistance ◽  
Temperature Changes ◽  
Solution Treated ◽  
Electrical Resistance Measurements ◽  
Ongoing Phase

Metastable β titanium alloy Ti-15Mo was investigated in this study. In-situ electrical resistance and thermal expansion measurements conducted on solution treated material revealed influence of ongoing phase transitions on measured properties. The monotonicity of the dependence of electrical resistance on temperature changes at 225, 365 and 560 °C The thermal expansion deviates from linearity between 305 and 580 °C.

MICROZINC ALLOY 700

Alloy Digest ◽  
1975 ◽  
Vol 24 (12) ◽  
Keyword(s):  
Electrical Conductivity ◽  
Thermal Expansion ◽  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Shear Strength ◽  
Heat Treating ◽  
Corrosion Resistant ◽  
Low Thermal Expansion ◽  
Chemical Division ◽  
Processing Differences

Abstract Microzinc Alloy 700 is a zinc-copper-titanium alloy with good creep strength, good ductility, low thermal expansion, good solderability, and good electrical conductivity. Processing differences give two commercial products or classes designated 701 and 702. This alloy is corrosion resistant and does not stain other materials. Its uses include architectural components and roofing systems. This datasheet provides information on composition, physical properties, hardness, tensile properties, and shear strength as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Zn-24. Producer or source: Ball Corporation, Metal and Chemical Division.

Abnormal Behavior of Lattice Spacing of Titanium Orthorhombic Martensite

2017 ◽  
Vol 907 ◽  
pp. 14-20 ◽  
Author(s):  
Sergey Demakov ◽  
Iana Semkina ◽  
Stepan Stepanov
Keyword(s):  
Thermal Expansion ◽  
Titanium Alloy ◽  
Lattice Spacing ◽  
Abnormal Behavior ◽  
X Ray ◽  
Orthorhombic Martensite

Samples of VT23 β-metastable titanium alloy quenched from temperatures in a range between critical and β-transus were studied in situ during heating on X-ray diffractometer. The anisotropy of orthorhombic martensite lattice was investigated. Abnormal behavior of «b» lattice spacing, which demonstrated a negative value of thermal expansion, has been revealed.

Experimental Verification of Finite Element Approach for Designing Robust Bolted Joints Using Titanium and Titanium Alloy Bolts at Elevated Temperature

2014 ◽  
Author(s):  
Toshimichi Fukuoka ◽  
Masataka Nomura ◽  
Takao Hirai
Keyword(s):  
Finite Element ◽  
Thermal Expansion ◽  
Titanium Alloy ◽  
Elevated Temperature ◽  
Carbon Steel ◽  
Thermal Load ◽  
Thermal Contact ◽  
Bolted Joints ◽  
Element Formulation ◽  
Clamping Force

When bolted joints are subjected to thermal load, variations of the bolt clamping force are of great concern from the view point of joint safety. It is considered that titanium and titanium alloy bolts have high possibility for clamping machines and structures subjected to thermal load. Its specific characteristic of low thermal expansion expectantly works well to mitigate the reduction of bolt clamping force caused by thermal expansion. Low weight, low Young’s modulus and high resistance to corrosion of titanium and titanium alloy are also highly attractive. In this paper, the effectiveness of the numerical method proposed in the previous study is validated by experiments using bolted joints composed of titanium bolts and carbon steel plates. Then, thermal and mechanical behaviors of titanium and titanium alloy bolts are analyzed by finite element analysis in order to examine the applicability of those bolts for the joints under elevated temperature. Numerical analyses are executed as in the manner introduced in the previous paper, i.e., by incorporating the thermal contact coefficient into the finite element formulation. Numerical results suggest that titanium and titanium alloy bolts are favorably applied to the joints made of carbon steel whose clamping forces are likely to decrease under elevated temperature.

Continuous and reversible atomic rearrangement in a multifunctional titanium alloy

Materialia ◽  
2018 ◽  
Vol 2 ◽  
pp. 1-8 ◽  
Author(s):  
Y.L. Hao ◽  
D.L. Gong ◽  
T. Li ◽  
H.L. Wang ◽  
J.M. Cairney ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Atomic Rearrangement

Microstructural and Microchemical Characterization of Nickel Sulfide Inclusions in Plate Glass

1991 ◽  
Vol 49 ◽  
pp. 962-963
Author(s):  
J. Cooper ◽  
O. Popoola ◽  
W. M. Kriven
Keyword(s):  
Thermal Expansion ◽  
Phase Transformation ◽  
Glass Matrix ◽  
Nickel Sulfide ◽  
Plate Glass ◽  
Thermal Expansion Mismatch ◽  
Volume Increase ◽  
Β Phase ◽  
Microchemical Characterization

Nickel sulfide inclusions have been implicated in the spontaneous fracture of large windows of tempered plate glass. Two alternative explanations for the fracture-initiating behaviour of these inclusions have been proposed: (1) the volume increase which accompanies the α to β phase transformation in stoichiometric NiS, and (2) the thermal expansion mismatch between the nickel sulfide phases and the glass matrix. The microstructure and microchemistry of the small inclusions (80 to 250 μm spheres), needed to determine the cause of fracture, have not been well characterized hitherto. The aim of this communication is to report a detailed TEM and EDS study of the inclusions.

Thermal Expansion of Martensitic A15 Superconductors: V3Si

1995 ◽  
Vol 05 (C8) ◽  
pp. C8-1109-C8-1113
Author(s):  
T.R. Finlayson, ◽  
M. Liu ◽  
T.F. Smith
Keyword(s):  
Thermal Expansion
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