Additive manufacturing of high-strength commercially pure titanium through lanthanum oxide addition

2021 ◽  
Vol 176 ◽  
pp. 111074
Author(s):  
Qiang Wang ◽  
Kang Zhang ◽  
Dong Qiu ◽  
Wenjuan Niu
Keyword(s):  
Additive Manufacturing ◽  
Lanthanum Oxide ◽  
Pure Titanium ◽  
High Strength ◽  
Commercially Pure Titanium ◽  
Oxide Addition ◽  
Commercially Pure

scholarly journals Fused filament fabrication‐based Additive Manufacturing of Commercially Pure Titanium

2021 ◽  
Author(s):  
Yvonne Thompson ◽  
Markus Polzer ◽  
Joamin Gonzalez-Gutierrez ◽  
Olga Kasian ◽  
Johannes P. Heckl ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Fused Filament Fabrication ◽  
Commercially Pure

Enhancement of Microstructural and Hardness Properties of Commercially Pure Titanium (Ti-0.5Zn) by Thermomechanical Processing

2013 ◽  
Vol 824 ◽  
pp. 275-282 ◽  
Author(s):  
Oluwagbenga T. Johnson ◽  
Olayinka O. Awopetu ◽  
Olurotimi A. Dahunsi
Keyword(s):  
Heat Treatment ◽  
Thermomechanical Processing ◽  
Density Ratio ◽  
Pure Titanium ◽  
High Strength ◽  
Commercially Pure Titanium ◽  
Β Phase ◽  
Commercially Pure ◽  
Hardness Property ◽  
Equiaxed Grains

Titanium alloys are widely used in the aerospace, biotechnology, automotive, energy, marine industrial constructions and components due to their high strength-to-density ratio, excellent fatigue/crack propagation behaviour and corrosion resistance. This study investigates the αβ phase transformation which Ti-0.5Zn alloy undergoes on being subjected to heat treatment with the aim of improving its properties and to enhance its industrial application. The β phase, with Widmatansttäten type growth was produced by heat treatment of the alloy in the temperature range of 800°C to 1000°C. The resultant microstructure and hardness of the alloy was also investigated. The result showed improved morphology evidenced by transformation from the equiaxed grains to more lamellar structures in the samples. Hardness property improved by 20% too.

Simulation and Experimental Study of Nanosecond Laser Micromachining of Commercially Pure Titanium

2015 ◽  
Vol 4 (1) ◽  
Author(s):  
E. Williams ◽  
E. B. Brousseau
Keyword(s):  
Laser System ◽  
Pulse Length ◽  
Pure Titanium ◽  
Weight Ratio ◽  
High Strength ◽  
Single Pulse ◽  
Small Scale ◽  
Nanosecond Laser ◽  
Commercially Pure Titanium ◽  
Commercially Pure

Nanosecond laser machining of titanium has gained increased interest in recent years for a number of potential applications where part functionalities depend on features or surface structures with microscale dimensions. In particular, titanium is one of the materials of choice to sustain the demand for advanced and miniaturized components in the biomedical and aerospace sectors for instance. This is due to its inherent properties of high strength-to-weight ratio, corrosion resistance, and biocompatibility. However, in the nanosecond laser processing regime, the resolidification and deposition of material expelled from the generated craters can be detrimental to the achieved machined quality at such small scale. Thus, this paper focuses on the investigation of the laser–material interaction process in this pulse length regime as a function of both the delivered laser beam energy and the pulse duration in order to optimize machining quality and throughput. To achieve this, a simple theoretical model for simulating single pulse processing was developed and validated first. The model was then used to relate (1) the temperature evolution inside commercially pure titanium targets with (2) the morphology of the obtained craters. Using a single fiber laser system with a wavelength of 1064 nm, this analysis was conducted for pulse durations comprised between 25 ns and 220 ns and a range of fluence values from 14 J cm−2 and 56 J cm−2. One of the main conclusions from the study is that the generation of relatively clean single craters could be best achieved with a pulse length in the range of 85–140 ns when the delivered fluence leads to the maximum crater temperature being above but still relatively close to the vaporization threshold of the cpTi substrate. In addition, the lowest surface roughness in the case of laser milling operations could be obtained when the delivered single pulses did not lead to the vaporization threshold being reached.

Laser Engineered Net Shaping of Commercially Pure Titanium: Effects of Fabricating Variables

2016 ◽  
Author(s):  
Yingbin Hu ◽  
Hui Wang ◽  
Fuda Ning ◽  
Weilong Cong
Keyword(s):  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Pure Titanium ◽  
Weight Ratio ◽  
High Strength ◽  
Commercially Pure Titanium ◽  
Laser Engineered Net Shaping ◽  
Commercially Pure ◽  
Net Shaping ◽  
Cp Ti

Commercially pure titanium (CP-Ti) attracts a large number of attentions in biomedical, astronautical, and auto industrial areas due to its superior properties of good biocompatibility, excellent corrosion resistance, and high strength-to-weight ratio. Comparing with the conventional manufacturing processes (such as casting along with machining), laser additive manufacturing (LAM), mainly including selective laser sintering/melting (SLS/M) and laser engineered net shaping (LENS), has many advantages, such as complex shaped parts producing, more capability of shorter design-to-market time, energy consumption reducing, etc. It was reported that SLS/M has been successfully used in fabricating of CP-Ti components. Comparing with SLS/M processes, LENS has many advantages, including lower labor intensity, higher fabrication efficiency, and more capabilities for parts repairing and rebuilding. It is reported that LENS process was only used in CP-Ti coating and porous parts fabrication, there are no reported investigations on CP-Ti three-dimensional (3D) solid parts using LENS process. The investigations in this paper are going to conduct preliminary studies on effect of fabricating variables. In order to evaluate powder efficiency and parts’ quality, heights of fabricated parts and hardness on the top surface of the parts will be tested.

scholarly journals Influence of Inhomogeneity on Mechanical Properties of Commercially Pure Titanium Processed by HPT

2018 ◽  
Vol 385 ◽  
pp. 284-289 ◽  
Author(s):  
Alexander P. Zhilyaev ◽  
Yi Huang ◽  
Jose María Cabrera ◽  
Terence G. Langdon
Keyword(s):  
Mechanical Properties ◽  
High Pressure Torsion ◽  
Structural Phase ◽  
Pure Titanium ◽  
High Strength ◽  
Alpha Phase ◽  
Commercially Pure Titanium ◽  
Omega Phase ◽  
Commercially Pure ◽  
Ti Powder

Already for fifteen years many researchers have been trying to discover metallic materials with unusual combinations of strength and ductility: with high strength and enhanced ductility. This combination may be achieved through different ways: alloying, nanostructuring, etc. This report is an attempt to analyze the influence of inhomogeneity of different types (structural, phase and space) on mechanical properties of commercially pure titanium (bulk and powder) subjected to high-pressure torsion. Experimental results for HPT bulk and powder titanium have demonstrated that mechanical behavior of CP titanium strongly depends on phase inhomogeneity (alpha + omega phases), structural inhomogeneity (bimodal grain size distribution) and space inhomogeneity (retained porosity) in case of cold consolidated Ti powder. High strength in HPT bulk titanium due to the formation of hard omega phase during HPT processing at room temperature was detected. The strong omega phase transforms back to nanograined alpha phase domains during short annealing at elevated temperature. HPT consolidation of titanium powder leads to the formation of brittle specimens showing high strength but almost zero plasticity.

scholarly journals Tensile properties of α-titanium alloys at elevated temperatures

2020 ◽  
Vol 321 ◽  
pp. 04016
Author(s):  
Tarik Nawaya ◽  
Werner Beck ◽  
Axel von Hehl
Keyword(s):  
Titanium Alloys ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Elevated Temperatures ◽  
Pure Titanium ◽  
High Strength ◽  
Tensile Tests ◽  
Commercially Pure Titanium ◽  
Commercially Pure ◽  
Gleeble 3500

Hot-deep drawing is an innovative processing technology to produce complex shaped sheet metal components with constant wall thickness from high-strength lightweight materials. For some aerospace and automotive applications oxidation resistance at medium to high temperatures is an important aspect. In terms of this titanium α-alloys are often used due to their balanced relation of strength and oxidation resistance. In the presented study the stress-strain characteristics of several α-titanium alloys were determined at ambient and elevated temperatures by means of hot tensile tests. Besides the commercially pure Titanium alloy ASTM-Grade 4, two novel α-titanium alloys were investigated. Regarding the hot forming properties a comparison with α-β Ti-6Al-4V alloy was conducted. The hot tensile tests were carried out by means of a particular forming dilatometer type “Gleeble 3500” at 400, 500, 600, 650, 700 and 800 °C. The test showed favorable peak plasticity for all α-alloys at the temperature range between 600 and 650 °C in contrast to lower or higher temperatures. All samples were metallographically characterized. Key words: titanium α-alloys, hot tensile properties, elevated temperatures, Gleeble 3500.

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