Effect of heat treatment on microstructure evolution and mechanical properties of Inconel 625 with 0.4 wt% boron modification fabricated by gas tungsten arc deposition

2017 ◽  
Vol 684 ◽  
pp. 275-283 ◽  
Author(s):  
Y. Tian ◽  
A. Gontcharov ◽  
R. Gauvin ◽  
P. Lowden ◽  
M. Brochu
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Microstructure Evolution ◽  
Inconel 625 ◽  
Gas Tungsten Arc ◽  
Boron Modification ◽  
Gas Tungsten ◽  
Arc Deposition

Microstructure evolution of Inconel 625 with 0.4 wt% boron modification during gas tungsten arc deposition

2017 ◽  
Vol 694 ◽  
pp. 429-438 ◽  
Author(s):  
Y. Tian ◽  
B. Ouyang ◽  
A. Gontcharov ◽  
R. Gauvin ◽  
P. Lowden ◽  
...  
Keyword(s):  
Microstructure Evolution ◽  
Inconel 625 ◽  
Gas Tungsten Arc ◽  
Boron Modification ◽  
Gas Tungsten ◽  
Arc Deposition

Effect of Inconel 625 on Microstructure and Mechanical Properties of Gas Tungsten Arc Welded Inconel-713LC Superalloy Joints

2019 ◽  
Vol 1156 ◽  
pp. 10-16
Author(s):  
Yu Chih Tzeng ◽  
Chih Ting Wu
Keyword(s):  
Mechanical Properties ◽  
Arc Welding ◽  
Inconel 625 ◽  
Strengthening Phase ◽  
X Ray ◽  
Gas Tungsten Arc ◽  
Nickel Based Superalloy ◽  
Microstructure And Mechanical Properties ◽  
The Matrix ◽  
Gas Tungsten

This study investigates how the use of Inconel filler metal 625 affects the microstructure and mechanical properties of gas tungsten arc welded joints of an IN-713LC nickel-based superalloy. Due to their difference in composition, obvious weld beads could be found by X-ray detection. In addition, it was found that the γ' strengthening phase was absent and carbide was present between the matrix and the weld bead during gas tungsten arc welding. These carbides are strongly related to the formation of cracking and weld shrinkage during solidification. The absence of the γ' strengthening phase and the presence of weld shrinkage and cracking led to a decrease in the hardness, tensile strength, and elongation of the welded pieces.

Autogenous Tungsten Inert Gas and Gas Tungsten Arc With Filler Welding of Dissimilar P91 and P92 Steels

2018 ◽  
Vol 140 (2) ◽  
Author(s):  
Chandan Pandey ◽  
Manas Mohan Mahapatra ◽  
Pradeep Kumar ◽  
N. Saini
Keyword(s):  
Mechanical Properties ◽  
Microstructure Evolution ◽  
Welded Joints ◽  
Welding Process ◽  
Postweld Heat Treatment ◽  
Inert Gas ◽  
P92 Steel ◽  
Gas Tungsten Arc ◽  
Δ Ferrite ◽  
Gas Tungsten

Creep strength ferritic/martensitic modified 9Cr-1Mo-V-Nb (P91) steel also designated as ASTM A335 and P92 steel are used for piping, cladding, ducts, wrappers, and the pressure vessel in Gen IV nuclear reactors. In the present investigation, a comparative study of the effect of autogenous tungsten inert gas welding (A-TIG) with double pass and multipass gas tungsten arc (GTA) welding with filler on microstructure evolution in the weld fusion zone and the mechanical properties of P91 and P92 steel welded joints was carried out. The microstructure evolution was studied in as-welded and postweld heat treatment (PWHT) condition. The study also focused on the evolution of δ-ferrite patches and their influence on the tensile properties of welded joints. PWHT was carried out at 760 °C with durations from 2 to 6 h. To study the effect of δ-ferrite evolution on mechanical properties, Charpy toughness, microhardness, and tensile tests were performed. The acceptable microstructure and mechanical properties were obtained after the 6 h of PWHT for A-TIG arc welding process while for GTA weld with filler wire, it was obtained after the 2 h of PWHT at 760 °C.

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