Influence of shape of weld toe and hardness of weld metal on fatigue properties in GMA welded fillet lap joint of UHSS sheet

2021 ◽  
pp. 1-13
Author(s):  
Chikaumi Sawanishi ◽  
Hiroshi Matsuda ◽  
Tetsuya Tagawa ◽  
Rinsei Ikeda ◽  
Seiichiro Tsutsumi
Keyword(s):  
Weld Metal ◽  
Fatigue Properties ◽  
Lap Joint ◽  
Weld Toe

scholarly journals Influence of shape of weld toe and hardness of weld metal on fatigue properties in GMA welded fillet lap joint of UHSS sheet

2020 ◽  
Vol 38 (4) ◽  
pp. 448-457
Author(s):  
Chikaumi SAWANISHI ◽  
Hiroshi MATSUDA ◽  
Tetsuya TAGAWA ◽  
Rinsei IKEDA ◽  
Seiichiro TSUTSUMI
Keyword(s):  
Weld Metal ◽  
Fatigue Properties ◽  
Lap Joint ◽  
Weld Toe

Very High Cycle Fatigue Behavior and Life Prediction of a Low Strength Weld Metal at Moderate Temperature

2011 ◽  
Author(s):  
Ming-Liang Zhu ◽  
Fu-Zhen Xuan ◽  
Zhengdong Wang
Keyword(s):  
Crack Initiation ◽  
Weld Metal ◽  
Room Temperature ◽  
Fatigue Behavior ◽  
Fatigue Properties ◽  
Dissimilar Welding ◽  
Initiation Mechanism ◽  
Metallic Inclusions ◽  
Low Strength ◽  
Very High

The fatigue properties of a low strength weld metal in a dissimilar welding joint in high cycle and very high cycle regimes were investigated by fully reversed axial tests in air at room temperature and 370°C. A clear duplex S-N curve existed as a result of the transition of fatigue failure mode from surface-induced failure to internal-induced failure at 370°C, while the S-N curve was continuously decreased at room temperature. A new model was successfully proposed to predict fatigue life, and interpret the crack initiation modes transition from surface inclusion to interior inclusion. It was concluded that cracks were initiated by competition among non-metallic inclusions, welding pores and discontinuous microstructures in high cycle regime. While in the very high cycle regime, non-metallic inclusions were the dominant crack initiation mechanism which depended on stress level, inclusion size as well as inclusion depth.

scholarly journals Effect of HFMI treatment procedure on weld toe geometry and fatigue properties of high strength steel welds

2016 ◽  
Vol 2 ◽  
pp. 3483-3490 ◽  
Author(s):  
Ebrahim Harati ◽  
Lars-Erik Svensson ◽  
Leif Karlsson ◽  
Kjell Hurtig
Keyword(s):  
High Strength Steel ◽  
High Strength ◽  
Fatigue Properties ◽  
Treatment Procedure ◽  
Weld Toe ◽  
Steel Welds

Microstructures and Mechanical Properties of Welded Joints of Several High Tensile Strength Steel

2018 ◽  
Vol 941 ◽  
pp. 224-229
Author(s):  
Takahiro Izumi ◽  
Tatsuya Kobayashi ◽  
Ikuo Shohji ◽  
Hiroaki Miyanaga
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Weld Metal ◽  
Welded Joints ◽  
Welded Joint ◽  
Steel Plates ◽  
Fatigue Properties ◽  
High Tensile Strength ◽  
The Matrix ◽  
Microstructures And Mechanical Properties

Microstructures and mechanical properties of lap fillet welded joints of several high and ultra-high tensile strength steel by arc welding were investigated. Steel plates having tensile strength of 400 (SPH400W), 590 (SPC590Y, SPC590R), 980 (SPC980Y) and 1500 MPa (SAC1500HP) class with 2 mm thickness were prepared. Four types of joints were formed by MAG welding; SPH400W/SPH400W, SPC590Y/SPC590Y, SPC980Y/SPC980Y and SAC1500HP/SPC590R. In joints with SPC590Y, SPC980Y and SAC1500HP steel which matrixes are martensitic microstructures, the HAZ softens due to transformation of martensite into ferrite with precipitating cementite. By using high and ultra-high tensile strength steel, the weld metal is strengthened due to dilution of the matrix into the weld metal and thus tensile shear strength of the welded joint increases. In the fatigue test, similar S-N diagrams were obtained in the all welded joints investigated. It seems that the effect of stress concentration due to the shape of the welded joint on fatigue properties is larger than that of the strength of the matrix.

Mechanical Properties of 5083 Aluminium Welds after Manual and Automatic Pulsed Gas Metal Arc Welding Using E5356 Filler

2010 ◽  
Vol 654-656 ◽  
pp. 2560-2563 ◽  
Author(s):  
Kalenda Mutombo ◽  
Madeleine du Toit
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Stress Concentration ◽  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Fatigue Properties ◽  
Filler Wire ◽  
Metal Arc Welding ◽  
Weld Toe ◽  
Fully Automatic

Semi-automatic and automatic pulsed gas metal arc welding (GMAW) of aluminium alloy 5083 with ER5356 filler wire causes considerable softening in the weld. The tensile strength of dressed automatic welds approaches that of the base metal, but the stress concentration caused by the weld toe in undressed semi-automatic welds reduced the tensile strength significantly. Fully automatic welds displayed improved fatigue properties compared to semi-automatic welds.

Joining Aluminium to Titanium by MIG Welding-Brazing Process

2011 ◽  
Vol 284-286 ◽  
pp. 165-168
Author(s):  
Bo Chen ◽  
Hong Tao Zhang ◽  
Wen Jie Jiang
Keyword(s):  
Tensile Strength ◽  
Titanium Alloy ◽  
Intermetallic Compound ◽  
Weld Metal ◽  
Filler Metal ◽  
Compound Layer ◽  
Intermetallic Compound Layer ◽  
Mig Welding ◽  
Lap Joint ◽  
Welding Wire

With Al-Si welding wire ER4043, lap joint between aluminium and titanium alloy was made by MIG welding-brazing process with nocolok flux aiding filler metal in promoting metal wettability. A thin intermetallic compound layer was formed at the interface between the weld metal and titanium alloy and the layer mainly consits of TiAl3 phase. The tensile strength of the joint can reach 151MPa and fracture occurred in aluminium base metal.

Study on the Fatigue Properties of the TIG Weld Joint with the Stainless Steel Conduit in Aircraft

2015 ◽  
Vol 664 ◽  
pp. 104-110
Author(s):  
Ying Liu ◽  
Dong Jie Li ◽  
Xiao Hong Li
Keyword(s):  
Stainless Steel ◽  
Stress Concentration ◽  
Crack Initiation ◽  
Crack Propagation ◽  
Weld Joint ◽  
Fatigue Cracks ◽  
Fatigue Properties ◽  
Research Focus ◽  
Weld Toe ◽  
Crack Initiation Life

The research focus on the material of the stainless steel thin conduit in aircraft, named 1Cr18Ni9Ti , and the TIG weld joint of which was investigated to analysis the fatigue properties. The fracture mechanics was used to analysis the crack initiation life and crack propagation life, and the fatigue surface was characterized with scanning electron microscope (SEM). The experimental and analytical results show that, the origin position of fatigue crack is the surface of the conduit. The stress concentration at the weld toe, the crystal structure is not uniform and Stress concentration in the heat affected zone (HAZ) and fusion line, so the fatigue cracks are easily generated in these locations. Delta K increases to a certain value, the HAZ has become one of the most dangerous position. The crack initiation life of HAZ in the total fatigue life is far higher than the proportion of crack propagation life.

High temperature low cycle fatigue properties of 316(N) weld metal and 316L(N)/316(N) weld joints

2008 ◽  
Vol 30 (3) ◽  
pp. 538-546 ◽  
Author(s):  
G.V. Prasad Reddy ◽  
R. Sandhya ◽  
M. Valsan ◽  
K. Bhanu Sankara Rao
Keyword(s):  
High Temperature ◽  
Weld Metal ◽  
Low Cycle Fatigue ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Weld Joints

scholarly journals Effect of PWHT Temperature and Time on Hardness and Microstructure of 410NiMo Weld Metal

2018 ◽  
Author(s):  
Uğur Özdemir ◽  
Selçuk Keskinkılıç ◽  
Filiz K. Acar ◽  
Fikret Kabakci ◽  
Mustafa Acarer
Keyword(s):  
Heat Treatment ◽  
Weld Metal ◽  
Hydraulic Turbine ◽  
Post Weld Heat Treatment ◽  
Fatigue Properties ◽  
Shielded Metal Arc Welding ◽  
Weld Metals ◽  
Metal Arc Welding ◽  
Hardness Tests ◽  
Weld Heat

ASTM A743 CA6NM alloy is a martensitic stainless steel typically used in energy industry -runners and hydraulic turbine components- due to its superior toughness, yield and fatigue properties. In both the manufacturing, shielded metal arc welding is applied to join for this grade steels. However, weldability of the steels is limited due to formation of hard and brittle phases such as untempered martensite during welding and post weld heat treatment processes. The formation causes a reduction in toughness. In this study, influence of post-weld heat treatment procedure (single tempering and double tempering) and parameters on microstructure and hardness of AWS410NiMo all weld metal. Hardness tests were conducted from weld metal. Microstructures of the all weld metals subjected to different heat treatment process were characterized.

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