Transformation of microstructure and properties of heterogeneous PHS laser welded joint of unequal thickness before and after hot forming

2021 ◽  
pp. 130918
Author(s):  
Jinlong Su ◽  
Xiaoming Qiu ◽  
Fei Xing ◽  
Cui Luo ◽  
Ye Ruan
Keyword(s):  
Welded Joint ◽  
Hot Forming ◽  
Microstructure And Properties ◽  
Before And After

Microstructure and properties of welded joint for T92 ferritic heat resistant steel

2017 ◽  
pp. 140523 ◽  
Author(s):  
Zhiquan Wu ◽  
Xin Zhang ◽  
Xiaoguo Song ◽  
Chengyong Ma ◽  
Yanchang Qi ◽  
...  
Keyword(s):  
Welded Joint ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Microstructure And Properties ◽  
Heat Resistant

Effect of Material States on Microstructure and Properties of GH4169 Superalloy Laser-Welded Joint

2020 ◽  
Vol 47 (10) ◽  
pp. 1002006
Author(s):  
孙文君 Sun Wenjun ◽  
王善林 Wang Shanlin ◽  
谭观华 Tan Guanhua ◽  
陈玉华 Chen Yuhua ◽  
信纪军 Xin Jijun ◽  
...  
Keyword(s):  
Welded Joint ◽  
Microstructure And Properties ◽  
Gh4169 Superalloy

Effect of Shot Peening on Microstructure and Properties of 34CrMo4 Alloy

2018 ◽  
Vol 934 ◽  
pp. 105-110 ◽  
Author(s):  
Ke Jian Li ◽  
Qiang Zheng ◽  
Yue Lin Qin ◽  
Xiao Wei Liu
Keyword(s):  
Plastic Deformation ◽  
Corrosion Resistance ◽  
Shot Peening ◽  
Electrochemical Impedance ◽  
Corrosion Current ◽  
Optical Microscope ◽  
Microstructure And Properties ◽  
Before And After ◽  
Sever Plastic Deformation ◽  
Evolution Of Microstructure

Plastic deformation can induce surface modification, such as shot peening (SP) on workpiece surface is the hot issue of recent scientific research. SP is the efficient way to improve mechanical behavior of specimens by inducing sever plastic deformation on their surface. Nevertheless, this surface treatment induced complex microstructural evolutions such as grain refinement, will enhance the corrosion resistance of specimens. In this work, the microstructure and properties of 34CrMo4 alloy of before and after SP for 20 min have been investigated. The evolution of microstructure and properties were analyzed from the surface and cross-section. The microstructure morphology at the different depth was determined by optical microscope. The results show grain size is increasing with the depth, and the microhardness and compressive residual stress decrease gradually. In terms of corrosion resistance, the 50 μm depth specimen has the best property than other depth, which the potential and corrosion current density are-0.484 V and-5.72 Acm-2, respectively. The maximum polarization resistance is 2055 Ωcm2by capacitive arc radius of electrochemical impedance spectroscopy.

Study on the Microstructure and Properties of Zl114a Friction Stir Welded Joint with Forced Cooling

2011 ◽  
Vol 189-193 ◽  
pp. 3335-3338
Author(s):  
Ge Ping Liu ◽  
Yu Hua Chen ◽  
Hong Yan Wu ◽  
Li Ming Ke
Keyword(s):  
Welded Joint ◽  
Silicon Particle ◽  
Welding Process ◽  
Weld Nugget ◽  
Air Cooling ◽  
Micro Hardness ◽  
Nugget Zone ◽  
Friction Stir ◽  
Microstructure And Properties ◽  
Forced Cooling

ZL114A was joined by friction stir welding and liquid nitrogen was used to cool the welded joint during the welding process. The Influence of forced cooling on the microstructure and properties of welded jointed was studied. The results show that, when forced cooling is used, the amount of silicon particles in weld nugget zone is larger and the size is more homogeneous, the size of silicon particle in heat-mechanical affected zone is more fine , the grain size of heat affected zone is half of air cooling welded joint and the amount of Al-Si eutectic is smaller than air cooling welded joint. The micro hardness increases after forced cooling is used, the hardness of weld nugget zone is 20Hv higher than air cooling welded joint. The strength of forced cooling welded joint increases 13.6% than air cooling welded joint.

scholarly journals Microstructure and Properties of an АА 2139 Alloy Welded Joint Produced by Linear Friction Welding

2015 ◽  
Vol 8 (6) ◽  
pp. 30-32
Author(s):  
S. K. Kiseleva ◽  
◽  
A. Y. Medvedev ◽  
V. M. Bychkov ◽  
B. O. Bolshakov ◽  
...  
Keyword(s):  
Friction Welding ◽  
Welded Joint ◽  
Linear Friction Welding ◽  
Microstructure And Properties ◽  
Linear Friction

Microstructure and Properties of ZL114A-2219 Laser Welded Joint

Applied laser ◽  
2013 ◽  
Vol 33 (4) ◽  
pp. 430-433
Author(s):  
董鹏 Dong Peng ◽  
张益坤 Zhang Yikun ◽  
陈靖 Chen Jing ◽  
淡婷 Dan Ting ◽  
王明 Wang Ming
Keyword(s):  
Welded Joint ◽  
Microstructure And Properties

Microstructure and Properties of Welds of Semi-Austenitic Precipitation Hardening Stainlees Steel after Heat Treatment

2013 ◽  
Vol 58 (2) ◽  
pp. 613-617 ◽  
Author(s):  
A. Ziewiec ◽  
E. Tasak ◽  
M. Witkowska ◽  
K. Ziewiec
Keyword(s):  
Heat Treatment ◽  
Welded Joints ◽  
Electron Microscope Study ◽  
Precipitation Hardening ◽  
Welded Joint ◽  
Inert Gas ◽  
Scanning Electron Microscope Study ◽  
Microstructure And Properties ◽  
Heat Treated ◽  
Δ Ferrite

This paper presents the studies of the microstructure and properties of the welded joints made of 15-7Mo precipitation hardened semi-austenitic stainless steel welded by Tungsten Inert Gas. Microstructural changes in the heat treated welded joints was assessed. It was found that the joints of 15-7Mo steel in as welded state contain martensite, austenite and δ-ferrite. Scanning electron microscope study of the joints was carried out. The sub-zero and destabilization heat treatment were found to decrease or completely eliminate the austenite in the microstructure and increase hardness of the welded joint.

Sign in / Sign up

Export Citation Format

Share Document