scholarly journals Refinement of the grain structure of additive manufactured titanium alloys via epitaxial recrystallization enabled by rapid heat treatment

2020 ◽  
Vol 180 ◽  
pp. 66-70 ◽  
Author(s):  
Zhiyi Zou ◽  
Marco Simonelli ◽  
Juliano Katrib ◽  
Georgios Dimitrakis ◽  
Richard Hague
2010 ◽  
Vol 436 ◽  
pp. 185-194 ◽  
Author(s):  
Pavlo E. Markovsky

Local Rapid Heat Treatment (LRHT) based on induction-heating methods can be used to form unique location-specific microstructures and properties in commercial titanium alloys while maintaining the bulk of the material in an initial, non-heat-treated condition. The present work is focused on practical aspects of LRHT application for microstructure/ mechanical properties improvement of some parts made of commercial titanium alloys. It is shown, that LRHT application could improve mechanical properties of such complicated part like turbine engine compressor blades, and two made of Ti-6Al-4V and VT22 titanium alloys goods after repair with Electron Beam Physical Vapor Deposition as well as with Build-up Welding.


1999 ◽  
Vol 263 (2) ◽  
pp. 142-154 ◽  
Author(s):  
Orest M Ivasishin ◽  
Roman V Teliovich

Author(s):  
S. Mujahid ◽  
C. Krivanec ◽  
W. Whittington ◽  
S. Agnew ◽  
J. Bhattacharyya ◽  
...  

Author(s):  
S. Mujahid ◽  
C. Krivanec ◽  
W. Whittington ◽  
S. Agnew ◽  
J. Bhattacharyya ◽  
...  

JOM ◽  
1996 ◽  
Vol 48 (7) ◽  
pp. 48-52 ◽  
Author(s):  
O. M. Ivasishin ◽  
P. E. Markovsky

Author(s):  
Kulwant Singh ◽  
Gurbhinder Singh ◽  
Harmeet Singh

The weight reduction concept is most effective to reduce the emissions of greenhouse gases from vehicles, which also improves fuel efficiency. Amongst lightweight materials, magnesium alloys are attractive to the automotive sector as a structural material. Welding feasibility of magnesium alloys acts as an influential role in its usage for lightweight prospects. Friction stir welding (FSW) is an appropriate technique as compared to other welding techniques to join magnesium alloys. Field of friction stir welding is emerging in the current scenario. The friction stir welding technique has been selected to weld AZ91 magnesium alloys in the current research work. The microstructure and mechanical characteristics of the produced FSW butt joints have been investigated. Further, the influence of post welding heat treatment (at 260 °C for 1 h) on these properties has also been examined. Post welding heat treatment (PWHT) resulted in the improvement of the grain structure of weld zones which affected the mechanical performance of the joints. After heat treatment, the tensile strength and elongation of the joint increased by 12.6 % and 31.9 % respectively. It is proven that after PWHT, the microhardness of the stir zone reduced and a comparatively smoothened microhardness profile of the FSW joint obtained. No considerable variation in the location of the tensile fracture was witnessed after PWHT. The results show that the impact toughness of the weld joints further decreases after post welding heat treatment.


Sign in / Sign up

Export Citation Format

Share Document