A process model for the heat-affected zone microstructure evolution in Al-Zn-Mg weldments

1999 ◽  
Vol 30 (10) ◽  
pp. 2667-2677 ◽  
Author(s):  
B. I. Bjørneklett ◽  
Ø. Grong ◽  
O. R. Myhr ◽  
A. O. Kluken
Keyword(s):  
Microstructure Evolution ◽  
Heat Affected Zone ◽  
Process Model ◽  
Zone Microstructure

Microstructure Evolution of Ti-6Al-4V Laser Weld Joint HAZ in Superplastic Deformation Process

2014 ◽  
Vol 511-512 ◽  
pp. 59-62
Author(s):  
Zhi Jiang Huang ◽  
Long Chen ◽  
Dong Hai Cheng ◽  
Yi Ping Chen ◽  
Dean Hu
Keyword(s):  
Growth Rate ◽  
Grain Growth ◽  
Microstructure Evolution ◽  
Weld Joint ◽  
Heat Affected Zone ◽  
Superplastic Deformation ◽  
Deformation Process ◽  
Lamellar Structure ◽  
Laser Weld ◽  
Zone Microstructure

Microstructure of Ti-6Al-4V laser weld joint heat affected zone was observed. The results suggested that the heat affected zone microstructure first transformed to lamellar structure, then the grain growth and transformed to equiaxial grains. At the same temperature, the grain growth rate was faster at lower deformation rate, and the microstructure was more uniform.

Effect of Post Weld Heat Treatment on Fusion and Heat Affected Zone Microstructure and Mechanical Properties of Inconel X-750 Welds

2011 ◽  
Vol 214 ◽  
pp. 108-112 ◽  
Author(s):  
Prachya Peasura ◽  
Bovornchok Poopat
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Grain Size ◽  
Grain Boundary ◽  
Weld Metal ◽  
Heat Affected Zone ◽  
Aging Temperature ◽  
Post Weld Heat Treatment ◽  
High Aging Temperature ◽  
Zone Microstructure

The Inconel X-750 indicates good hot corrosion resistance, high stability and strength at high temperatures and for this reason the alloy is used in manufacturing of gas turbine hot components. The objective of this research was study the effect of post weld heat treatment (PWHT) on fusion zone and heat affected zone microstructure and mechanical properties of Inconel X-750 weld. After welding, samples were solutionized at 1500 0C. Various aging temperature and times were studied. The results show that aging temperature and time during PWHT can greatly affect microstructure and hardness in fusion zone and heat affected zone. As high aging temperature was used, the grain size also increased and M23C6 at the grain boundary decreased. This can result in decreased of hardness. Moreover excessive aging temperature can result in increasing MC carbide intensity in parent phase (austenite). It can also be observed that M23C6 at the grain boundary decreased due to high aging temperature. This resulted in decreasing of hardness of weld metal and heat affected zone. Experimental results showed that the aging temperature 705 0C aging time of 24 hours provided smaller grain size, suitable size and intensity of MC carbide resulting in higher hardness both in weld metal and HAZ.

Effects of Heat-Affected Zone Microstructure on Fracture Toughness of Two X70 Pipe Girth Welds

2017 ◽  
Vol 48 (7) ◽  
pp. 3248-3260 ◽  
Author(s):  
Dong-Yeob Park ◽  
Babak Shalchi Amirkhiz ◽  
Jean-Philippe Gravel ◽  
Yiyu Wang ◽  
Leijun Li ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Heat Affected Zone ◽  
Girth Welds ◽  
Zone Microstructure

Microstructure Evolution of Fine-Grained Heat-Affected Zone of Gr.92 Steel Welded Joint During Creep

2019 ◽  
Vol 50 (7) ◽  
pp. 3080-3090 ◽  
Author(s):  
Y. Liu ◽  
S. Tsukamoto ◽  
H. Hongo ◽  
F. Yin ◽  
M. Tabuchi ◽  
...  
Keyword(s):  
Microstructure Evolution ◽  
Heat Affected Zone ◽  
Welded Joint ◽  
Fine Grained
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