Investigation on Post-Weld Heat Treated Titanium-Aluminum Dissimilar Laser Welded Joint

2021 ◽  
Author(s):  
Sudhin Chandran ◽  
R. Rajesh ◽  
M. Dev Anand
Keyword(s):  
Welded Joint ◽  
Heat Treated ◽  
Titanium Aluminum ◽  
Weld Heat

An investigation on microstructure and mechanical properties of post-weld heat-treated friction stir welds in aluminum alloy 2024-W

2012 ◽  
Vol 227 (4) ◽  
pp. 649-662 ◽  
Author(s):  
Hakan Aydın ◽  
Ali Bayram ◽  
İsmail Durgun
Keyword(s):  
Room Temperature ◽  
Welded Joint ◽  
Solution Treatment ◽  
Heat Treatments ◽  
Maximum Hardness ◽  
Friction Stir ◽  
Base Materials ◽  
Heat Treated ◽  
Aluminum Alloy 2024 ◽  
Weld Heat

The present work describes the results obtained from microstructural and mechanical evaluation of post-weld heat treated friction stir welds of 2024 aluminum alloys in the W temper state. Post-weld heat treatments have been carried out at 510 °C for 2.5 h followed by ageing at room temperature for 6 months, at 100 °C and 190 °C for 10 h, and by cooling in static air (O-temper). The solution treatment caused abnormal coarsening of the grains in the stir zone, which resulted in a drop in microhardness. The strength of the as-welded joint was significantly incrased by post weld heat treatments. The maximum hardness and strength values were obtained in T6 (190 °C, 10 h) treated joint. However, the T6 (190 °C, 10 h) treated joint had the lowest ductility. On the other hand, the tensile properties of the post-weld heat treated joints were far lower than those of the unwelded base materials in the same temper states. In addition, the post-weld heat treatments did not significantly change the fracture locations of the friction stir welds.

scholarly journals Tensile modeling of titanium-aluminum composite with a wave profile of a welded joint and local melts

2021 ◽  
Vol 1901 (1) ◽  
pp. 012087
Author(s):  
L M Gurevich ◽  
V F Danenko ◽  
D V Pronichev ◽  
S P Pisarev
Keyword(s):  
Welded Joint ◽  
Wave Profile ◽  
Aluminum Composite ◽  
Titanium Aluminum

METALLURGICAL AND CORROSION CHARACTERIZATION OF POST WELD HEAT TREATED DUPLEX STAINLESS STEEL (UNS S31803) JOINTS BY FRICTION WELDING PROCESS

2016 ◽  
Vol 23 (03) ◽  
pp. 1650013 ◽  
Author(s):  
MOHAMMED ASIF M. ◽  
KULKARNI ANUP SHRIKRISHNA ◽  
P. SATHIYA
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Friction Welding ◽  
Volume Fraction ◽  
Welding Process ◽  
Equilibrium Temperature ◽  
Weld Interface ◽  
Heat Treated ◽  
Weld Heat

The present study focuses on the metallurgical and corrosion characterization of post weld heat treated duplex stainless steel joints. After friction welding, it was confirmed that there is an increase in ferrite content at weld interface due to dynamic recrystallization. This caused the weldments prone to pitting corrosion attack. Hence the post weld heat treatments were performed at three temperatures 1080[Formula: see text]C, 1150[Formula: see text]C and 1200[Formula: see text]C with 15[Formula: see text]min of aging time. This was followed by water and oil quenching. The volume fraction of ferrite to austenite ratio was balanced and highest pit nucleation resistance were achieved after PWHT at 1080[Formula: see text]C followed by water quench and at 1150[Formula: see text]C followed by oil quench. This had happened exactly at parameter set containing heating pressure (HP):40 heating time (HT):4 upsetting pressure (UP):80 upsetting time (UP):2 (experiment no. 5). Dual phase presence and absence of precipitates were conformed through TEM which follow Kurdjumov–Sachs relationship. PREN of ferrite was decreasing with increase in temperature and that of austenite increased. The equilibrium temperature for water quenching was around 1100[Formula: see text]C and that for oil quenching was around 1140[Formula: see text]C. The pit depths were found to be in the range of 100[Formula: see text]nm and width of 1.5–2[Formula: see text][Formula: see text]m.

Influence of Friction Stir Welding Process on the Weld Formation and Tensile Strength of Titanium and Aluminum Dissimilar Alloys Welded Joint

2011 ◽  
Vol 189-193 ◽  
pp. 3266-3269 ◽  
Author(s):  
Yu Hua Chen ◽  
Peng Wei ◽  
Quan Ni ◽  
Li Ming Ke
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Cross Section ◽  
Welded Joint ◽  
Welding Process ◽  
Dissimilar Materials ◽  
Influence Of Process Parameters ◽  
Friction Stir ◽  
Dissimilar Alloys ◽  
Titanium Aluminum

Titanium alloy TC1 and Aluminum alloy LF6 were jointed by friction stir welding (FSW), and the influence of process parameters on formation of weld surface, cross-section morphology and tensile strength were studied. The results show that, Titanium and Aluminum dissimilar alloy is difficult to be joined by FSW, and some defects such as cracks and grooves are easy to occur. When the rotational speed of stir head(n) is 750r/min and 950r/min, the welding speed(v) is 118mm/min or 150mm/min, a good formation of weld surface can be obtained, but the bonding of titanium/aluminum interface in the cross-section of weld joint is bad when n is 750r/min which results in a low strength joint. When n is 950r/min and v is 118mm/min，the strength of the FSW joint of Titanium/Aluminum dissimilar materials is 131MPa which is the highest．

scholarly journals SIMULATION OF THE BEHAVIOR OF TITANIUM-ALUMINUM COMPOSITE WITH WAVE PROFILE OF WELDED JOINT

2021 ◽  
pp. 37-42
Author(s):  
L. M. Gurevich ◽  
V. F. Danenko ◽  
V. Abo-Shakra
Keyword(s):  
Finite Element ◽  
Aluminum Alloy ◽  
Welded Joint ◽  
Tensile Deformation ◽  
Wave Profile ◽  
Relative Thickness ◽  
Aluminum Composite ◽  
Active Deformation ◽  
Element Simulation ◽  
Titanium Aluminum

The finite element simulation of tensile deformation of titanium-aluminum composite D20 - AD1 - VT6S was carried out. The composite had a wave profile of the welded joint at the boundaries D20 - AD1 and AD1 -VT6S. The thickness of the AD1 interlayer was varied in the simulation from 0.25 to 4 mm. The relative thickness of the interlayer corresponding to the onset of active deformation of the aluminum alloy has been determined.

Effect of post-weld heat treatment on inhomogeneity of aluminum/copper rotary friction welded joint

2018 ◽  
Vol 5 (9) ◽  
pp. 096504 ◽  
Author(s):  
Peng Li ◽  
Longwei Pan ◽  
Xiaohu Hao ◽  
Shuai Li ◽  
Honggang Dong
Keyword(s):  
Heat Treatment ◽  
Welded Joint ◽  
Post Weld Heat Treatment ◽  
Weld Heat
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