Investigation on the Microstructures and Tensile Properties of TA15 Titanium Alloy Thick-Wall Parts Formed by Laser Rapid Forming Process

2013 ◽  
Vol 650 ◽  
pp. 7-11
Author(s):  
Ming Zhe Xi
Keyword(s):  
Titanium Alloy ◽  
Tensile Properties ◽  
Alpha Phase ◽  
Thick Wall ◽  
Forming Process ◽  
Scanning Velocity ◽  
Heat Treated ◽  
Ta15 Titanium Alloy ◽  
Overlap Method ◽  
Laser Rapid Forming

TA15 titanium alloy thick-wall parts have been deposited by Laser rapid forming (LRF) process. In this paper, a new overlap method between two adjacent laser tracks has been used to deposit the thick-wall titanium part. Results showed that the LRFed thick-wall titanium part was good in shape by using the new overlap method. The microstructure of the LRFed titanium alloy primarily consists of columnar prior-beta grain, which is perpendicular to the substrate resulting from directionally solidification. It also could be observed that the size of alpha phase increased with increasing laser power and decreasing scanning velocity. Tensile properties of LRFed titanium was slightly lower than that of the wrought annealed TA15 titanium alloy, after the heat-treatment of 940°C/1h/AC, the heat-treated titanium alloy showed good tensile properties which were equivalent to that of the wrought annealed TA15 titanium alloy.

MST 6AL-4V

Alloy Digest ◽  
1955 ◽  
Vol 4 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Hot Strength ◽  
High Toughness ◽  
Temperature Performance ◽  
Heat Treated

Abstract MST 6A1-4V is a highly stabilized titanium alloy having high toughness with good hot strength. It can be readily welded and heat treated. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ti-9. Producer or source: Mallory-Sharon.

Correlation between alpha phase morphology and tensile properties of a new beta titanium alloy

2017 ◽  
Vol 121 ◽  
pp. 24-35 ◽  
Author(s):  
S. Sadeghpour ◽  
S.M. Abbasi ◽  
M. Morakabati ◽  
S. Bruschi
Keyword(s):  
Titanium Alloy ◽  
Tensile Properties ◽  
Alpha Phase ◽  
Phase Morphology ◽  
Beta Titanium Alloy ◽  
Beta Titanium

Pulse Current Auxiliary Tensile and Bulging of Light Metal Alloy

2013 ◽  
Vol 690-693 ◽  
pp. 2356-2360 ◽  
Author(s):  
Jing Yuan Liu ◽  
Kai Feng Zhang ◽  
Shao Song Jiang
Keyword(s):  
Titanium Alloy ◽  
Magnesium Alloy ◽  
Pulse Current ◽  
Superplastic Forming ◽  
Az31 Magnesium Alloy ◽  
Forming Process ◽  
Polarity Effect ◽  
Tensile Process ◽  
Ta15 Titanium Alloy ◽  
The Impact

Pulse current effects during hot tensile process and superplastic forming process of AZ31 magnesium alloy and TA15 titanium alloy were investigated in this paper. The experimental results indicate that the current can produce polarity effect to coarse grain AZ31 magnesium alloy, but to fine grained TA15 titanium alloy, the polarity effect is not obvious. The impact of electron wind force can change the strength of material during tensile process and affect final shape of part, making the dome of AZ31 hemisphere part deviated from the axis to the side of positive pole during superplastic forming process. In addition, the impact of current depends on current density and dislocation density.

scholarly journals Spatial and Direction-Based Characterization of Microstructures and Microhardness of TA15 Titanium Alloy Produced by Electron Beam Melting

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 495
Author(s):  
Jiangtao Ran ◽  
Xiaojing Sun ◽  
Shiliang Wei ◽  
Zhuo Chen ◽  
Hong Zhao
Keyword(s):  
Titanium Alloy ◽  
Electron Beam ◽  
Electron Beam Melting ◽  
Grain Morphology ◽  
Longitudinal Direction ◽  
Forming Process ◽  
Microstructural Characteristics ◽  
Ta15 Titanium Alloy ◽  
Average Relative Density

The extracted position and characterization direction of specimens have an unignorable effect on the microstructural characteristics of materials produced by electron beam melting (EBM). This study focused on the effects of extracted position and characterization direction on the microstructure, defect distribution and Vickers hardness of TA15 titanium alloy fabricated by electron beam melting. Results show that the microstructure at the bottom end of TA15 specimens is coarser and hot cracks are visible at this end. Grain morphology in longitudinal direction is columnar while that in transversal direction is chessboard-like. The results of defect analysis show that gas pores are visible in transversal direction while lack of fusion exists in longitudinal direction. The average relative density of TA15 specimens in transversal direction is higher than that in longitudinal direction. The results of energy spectrum analysis show that there is evaporation of Al during the forming process, but no elements segregation and enrichment are observed. This study provides important insights on the microstructure analysis and defect evaluation of materials made by EBM technology.

Effect of Process Parameters on Laser Beam Formed Titanium Alloy Sheet

2014 ◽  
Vol 622-623 ◽  
pp. 1193-1199
Author(s):  
Stephen Akinlabi ◽  
Esther Titilayo Akinlabi
Keyword(s):  
Titanium Alloy ◽  
Laser Beam ◽  
Process Parameters ◽  
Structural Integrity ◽  
Good Control ◽  
Alloy Sheet ◽  
Beam Power ◽  
Beam Forming ◽  
Forming Process ◽  
Scanning Velocity

Titanium alloy (Ti6Al4V) is the most widely used alloy grade of titanium in the aerospace industry because of its excellent properties. Laser beam forming is a highly flexible rapid prototyping and low-volume manufacturing process that employs laser-induced thermal distortion to shape sheet metal parts without hard tooling or external forces. The resulting formed shape and the curvature are determined by the beam power and size, scanning velocity, number of scan irradiations and the effect of cooling, all these form part of the process parameters that have to be optimised in order to achieve the desired shape and properties in formed components. Hence, a good control of the process parameters is inevitable to achieve these desired properties. Controlling a single process parameter in a process may be considered easy to manage than a system of multiple parameter process such as a laser beam forming process. This study investigates the effect of the scan velocity, laser power and cooling effect on the developed curvature with the aim of achieving good structural integrity.

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