scholarly journals Microstructure and Mechanical Characterization of X70 Steel Welded Joints Through Hardness Mapping and Tensile Strength Testing

2017 ◽  
Vol 62 (4) ◽  
pp. 2021-2027
Author(s):  
A. Hamdollahzadeh ◽  
H. Omidvar ◽  
A. Amirnasiri
Keyword(s):  
Mechanical Properties ◽  
Tensile Test ◽  
Welded Joints ◽  
Optical Microscope ◽  
Welded Steel ◽  
Joint Zone ◽  
Fine Grain ◽  
Microstructure And Mechanical Properties ◽  
Light Optical Microscope

AbstractIn this paper, effects of preheating and type of electrode (E8010 and E8018) on microstructure and mechanical properties of 5L X70 steel welded joints were investigated. The microstructure of joint zone and fracture surface was analyzed by light optical microscope and scanning electron microscope equipped with energy dispersive spectroscopy. Hardness mapping and tensile test were also performed to find the relationship between microstructure and mechanical properties. The results showed a consistency between the hardness variation data and the microstructure of joint zone. Moreover, hardness mapping revealed coarse and fine grain subregions in the heat affected zone which were not detected in the micrographs. The tensile test indicated that the non-preheated sample, welded by cellulosic E8010, had the minimum value in the strength and the ductility of welded steel. The fractography also determined that size and distribution of strengthening phases affected the fracture mode of welded specimens.

Effect of Erbium Addition on the Microstructure and Mechanical Properties of Aluminium Alloy

2019 ◽  
Vol 796 ◽  
pp. 62-66 ◽  
Author(s):  
Rosli Ahmad ◽  
N.A. Wahab ◽  
S. Hasan ◽  
Z. Harun ◽  
M.M. Rahman ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Test ◽  
Aluminium Alloy ◽  
Aluminium Alloys ◽  
Earth Metal ◽  
Hardness Test ◽  
Optical Microscope ◽  
Unmodified Alloy ◽  
Microstructure And Mechanical Properties ◽  
A380 Alloy

The effect of rare earth metal erbium (Er) modification on the microstructure and mechanical properties of aluminium alloys (A380) were investigated using Optical Microscope (OM), Scanning Electronic Microscope (SEM) attached with Electron Dispersive Scanning (EDS), Vicker’s hardness test and Ultimate Tensile Test (UTS). The results show that the addition of Er reduces the size of the silicon particle and improve mechanical properties of the aluminium alloy. In addition, by adding 0.1 wt. % of Er, the mean area (μm2) and aspect ratio value decreased. The coarse plate like existed in the unmodified alloy transformed into fine particle and short rod. The mechanical properties were investigated by using tensile test and Vicker’s hardness test. The ultimate tensile strength test shows that the tensile and the elongation increased 1.32 % and 9.1 % with 0.1 wt. % Er content of the aluminium alloys, respectively. The hardness improved from the addition of 0.1% Er aluminium A380 alloy.

scholarly journals Mechanical Properties of Welded Joints of 1.3964 Steel for Computer Aided Engineering (CAE) Purposes

2020 ◽  
Vol 220-221 (1-2) ◽  
pp. 15-28
Author(s):  
Radosław Kiciński ◽  
Wojciech Jurczak
Keyword(s):  
Mechanical Properties ◽  
Tensile Test ◽  
Welded Joints ◽  
Material Model ◽  
Computer Aided Engineering ◽  
Strength Analysis ◽  
Welded Steel ◽  
Static Tensile Test ◽  
Computer Aided ◽  
Static Tensile

AbstractThe article presents the study of mechanical properties of welded steel from which the hull of a modern mine destroyer was made. Keeping the tightness of ship compartments during operation depends on the strength of these joints. The results of testing the mechanical properties of 1.3964 steel and its welded joints subjected to a static tensile test were presented, and a Johnson – Cook material model was proposed. The material model can be used in CAE (Computer Aided Engineering) simulations related to hull strength analysis.

Mechanical properties and metallurgical characterization of FSPed TIG and TIG welded AA5052-H32/AA5083-H111 dissimilar aluminium alloys

2021 ◽  
Vol 118 (3) ◽  
pp. 304
Author(s):  
Antony Prabu Dhanaraj ◽  
Subbaiah Kumarasamy
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Optical Microscope ◽  
Sem Analysis ◽  
Strength Analysis ◽  
Friction Stir ◽  
Fine Grain ◽  
Grain Structures ◽  
Metallurgical Characterization

This work describes the mechanical properties and metallurgical characterization of Friction Stir Processing (FSP) on TIG welded dissimilar AA5052-H32 and AA5083-H111 alloys using ER5356 filler wire. A comparison is drawn between unprocessed TIG weld and FS Processed (FSPed) TIG welded specimen with the identical combination. The fabricated welded joints were investigated By Optical Microscope (OM), Scanning Electron Microscope (SEM) Analysis, Tensile Strength Analysis, and Micro-Hardness testing. The results illustrate the improvement in mechanical properties after FSPed of the TIG welded joint resulting in enhanced tensile strength (224.5 MPa) and hardness (104 HV) in contrast to the unprocessed TIG weld joints with (192.5 MPa) and (70 Hv). In addition, during the mechanical characterization, the FSPed TIG welds show fine grain at the Friction Stir (FS) processed zone with fine grain structures which improves the hardness at the FS zone. The mechanical property of FS joint is superior when compared to the unprocessed TIG weld joint.

scholarly journals Characterization of Mechanical Heterogeneity in Dissimilar Metal Welded Joints

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4145
Author(s):  
He Xue ◽  
Zheng Wang ◽  
Shuai Wang ◽  
Jinxuan He ◽  
Hongliang Yang
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Welded Joints ◽  
Structural Integrity ◽  
Material Interfaces ◽  
Mechanical Heterogeneity ◽  
Finite Element Software ◽  
Dissimilar Metal ◽  
Stress Changes

Dissimilar metal welded joints (DMWJs) possess significant localized mechanical heterogeneity. Using finite element software ABAQUS with the User-defined Material (UMAT) subroutine, this study proposed a constitutive equation that may be used to express the heterogeneous mechanical properties of the heat-affected and fusion zones at the interfaces in DMWJs. By eliminating sudden stress changes at the material interfaces, the proposed approach provides a more realistic and accurate characterization of the mechanical heterogeneity in the local regions of DMWJs than existing methods. As such, the proposed approach enables the structural integrity of DMWJs to be analyzed in greater detail.

Characterization of the transient mechanical properties of human cornea tissue using the tensile test simulation

2021 ◽  
Vol 26 ◽  
pp. 102122
Author(s):  
Milad Mahdian ◽  
Alireza Seifzadeh ◽  
Ali Mokhtarian ◽  
Farideh Doroodgar
Keyword(s):  
Mechanical Properties ◽  
Tensile Test ◽  
Human Cornea
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