Intermediate layer, microstructure and mechanical properties of aluminum alloy/stainless steel butt joint using laser–MIG hybrid welding–brazing method

2017 ◽  
Vol 31 (16-19) ◽  
pp. 1744035 ◽  
Author(s):  
Zongtao Zhu ◽  
Zhandong Wan ◽  
Yuanxing Li ◽  
Junyu Xue ◽  
Chen Hui
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Stainless Steel ◽  
Intermediate Layer ◽  
Mg Alloy ◽  
304 Stainless Steel ◽  
Double Layers ◽  
Al Alloy ◽  
Hybrid Welding ◽  
Total Thickness

Butt joining of AA6061 aluminum (Al) alloy and 304 stainless steel of 2-mm thickness was conducted using laser–MIG hybrid welding–brazing method with ER4043 filler metal. To promote the mechanical properties of the welding–brazing joints, two kinds of intermediate layers (Al–Si–Mg alloy and Ag-based alloy) are used to adjust the microstructures of the joints. The brazing interface and the tensile strength of the joints were characterized. The results showed that the brazing interface between Al alloy and stainless steel consisted of double layers of Fe2Al5 (near stainless steel) and Fe4Al[Formula: see text] intermetallic compounds (IMCs) with a total thickness of 3.7 [Formula: see text]m, when using Al–Si–Mg alloy as the intermediate layer. The brazing interface of the joints using Ag-based alloy as intermediate layer also consists of double IMC layers, but the first layer near stainless steel was FeAl2 and the total thickness of these two IMC layers decreased to 3.1 [Formula: see text]m. The tensile strength of the joints using Al–Si–Mg alloy as the intermediate layer was promoted to 149 MPa, which was 63 MPa higher than that of the joints using Al–Si–Mg alloy as the intermediate layer. The fractures occurred in the brazing interface between Al alloy and stainless steel.

scholarly journals Improving the Mechanical Properties of 304 Stainless Steel Using Waterjet Peening

2019 ◽  
Vol 26 (2) ◽  
pp. 161-167 ◽  
Author(s):  
Yun ZOU ◽  
Zhenkuan SANG ◽  
Qilong WANG ◽  
Tingchao LI ◽  
Dalei LI ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Stainless Steel ◽  
Compressive Stress ◽  
Residual Compressive Stress ◽  
304 Stainless Steel ◽  
Surface Morphologies ◽  
Strength And Ductility ◽  
Effect Phase ◽  
Refinement Effect

Abstract: In this study, waterjet peening (WJP) treatments under different water pressures were utilized to improve the mechanical properties of 304 stainless steel. The surface morphologies, microstructures, phases, and mechanical properties under different pressures in the WJP process were systematically investigated. The results show that WJP treatments successfully introduced a hardening layer and residual compressive stress. The optimal hardening layer, hardness, residual compressive stress, tensile strength, and ductility were all recorded at the pressure of 200 MPa. The improved hardness, tensile strength, and ductility of 304 stainless steel treated with WJP treatments at the pressure of 200 MPa can be attributed to the hardening layer with much apparent grain refinement effect, phase transformation, smaller surface roughness, and a specific residual compressive stress, as compared with the WJP treatments under other water pressures.

Investigation on Mechanical Properties of Pulsed Nd:YAG Laser Welding on AISI 304 Stainless Steel to AISI 1008 Steel

2011 ◽  
Vol 117-119 ◽  
pp. 402-408
Author(s):  
Shazarel Shamsudin ◽  
Phoon Chee Yoon
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Stainless Steel ◽  
Laser Welding ◽  
High Energy ◽  
High Energy Density ◽  
304 Stainless Steel ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Pulsed Nd:Yag Laser Welding

Product with low cost, lightweight and enhanced mechanical properties were the main reasons welding dissimilar materials thrived by most of the industries. The laser welding technique which has high-energy density beam was found suitable of carrying this task. This paper attempts to investigate welding of AISI 304 stainless steel to AISI 1008 steel through Nd:YAG pulse laser method. The main objective of this study was to find out the weldability of these materials and investigate the mechanical properties of the welded butt joints. Peak power, pulse duration and weld speed combinations were carefully selected with the aims of producing weld with a good tensile strength, minimum heat affected zone (HAZ) and acceptable welding profile. Response surface methodology (RSM) approach was adopted as statistical design technique for tensile strength optimization. Statistical based mathematical model was developed to describe effects of each process parameters on the weld tensile strength and for response prediction within the parameter ranges. The microstructure of the weld and heat affected zones were observed via optical microscope. The results indicate the developed model can predict the response within ±9% of error from the actual values.

scholarly journals Effect of Welding Groove and Electrode Variation to the Tensile Strength and Macrostructure on 304 Stainless Steel and AISI 1045 Dissimilar Welding Joint Using SMAW Process

2021 ◽  
Vol 2117 (1) ◽  
pp. 012018
Author(s):  
Suheni ◽  
A A Rosidah ◽  
D P Ramadhan ◽  
T Agustino ◽  
F F Wiranata
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Stainless Steel ◽  
Arc Welding ◽  
304 Stainless Steel ◽  
Dissimilar Welding ◽  
Test Results ◽  
Advantages And Disadvantages ◽  
Metal Arc Welding ◽  
Aisi 1045

Abstract AISI 1045 and 304 stainless steel are widely used in automotive and industrial fields However, both of these steels have their own advantages and disadvantages. AISI 1045 is not resistant to corrosion but has good wear resistance and low price. Meanwhile, the 304 stainless steel provides good corrosion resistance and mechanical properties but is costly. Their combination is able to provide a good property and reduce the costs. Thus, in order to combine these two metals, shield metal arc welding is carried out using welding groove and electrode variation. The groove variations used were double bevel, V, and double V-groove, additionally, the electrode variations used were E6013 and E7016. Then, the welding results were characterized using the tensile strength and macrostructure analysis. The results revealed that the specimen using E7016 electrode for the double V-groove resulted in the highest tensile test results the value of 270.48 MPa yield strength, 411.49 MPa tensile strength, and 19.81% elongation. The macrostructure analysis showed that the specimens using E7016 electrode gave a narrow HAZ that led to higher mechanical properties.

scholarly journals Effect of multiple warm rolling on microstructure and mechanical properties of 304 stainless steel prepared by aluminothermic reaction

2020 ◽  
Vol 12 (5) ◽  
pp. 168781401985099 ◽  
Author(s):  
H Abdelrahim ◽  
HB Mohamed ◽  
Peiqing La ◽  
Wei Fuma ◽  
Fuling Ma ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Stainless Steel ◽  
Yield Strength ◽  
Stainless Steels ◽  
Warm Rolling ◽  
Thickness Reduction ◽  
304 Stainless Steel ◽  
Reaction Method ◽  
Aluminothermic Reaction

304 stainless steels were prepared by aluminothermic reaction method; first steels are annealed at 1000°C and then rolled at 700°C for different deformation. The microstructures evolution and mechanical properties were distinguished in details. It was found that the steel contains nanocrystalline/submicrocrystalline/microcrystalline austenite and submicrocrystalline ferrite. After rolling to a thickness reduction of 30%, 50%, and 70%, the mechanical properties of the rolled steels were substantially increased, as the deformation increased from 30% to 50%, the tensile strength increased from 650 to 1110 MPa, the yield strength increased from 400 to 665 MPa, and the elongation increased from 8% to 8.5%.

Optimization of Strength and Ductility in Ultra-Fine 304 Stainless Steel after Equal-Channel Angular Processing

2010 ◽  
Vol 667-669 ◽  
pp. 937-942 ◽  
Author(s):  
Z.J. Zheng ◽  
Yan Gao ◽  
Y. Gui ◽  
M. Zhu
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Stainless Steel ◽  
Dislocation Density ◽  
Vickers Hardness ◽  
304 Stainless Steel ◽  
Angular Pressing ◽  
Equal Channel Angular Processing ◽  
Strength And Ductility

The microstructure and mechanical properties of 304 stainless steel were investigated which was subjected to equal channel angular pressing (ECAP). Tensile strength, elongation, Vickers hardness of as-ECAPed and annealed ECAPed 304 stainless steel were systematically measured and compared and microstructure evolution during ECAP and ECAP+annealing was observed by OM and TEM. It was found that with the increasing of ECAP passes, the grain size of stainless steel was effectively refined to nanoscale, such as about 50 nm after 8 ECAP-passes. In addition, the dislocation density in ECAPed samplel increased greatly, consequently, the tensile strength and hardness of ECAPed 304 stainless steel increased and elongation decreased remarkably. After annealing at 600°C for 10 min，the ductility of ECAPed stainless steel was improved greatly while grains did not have obvious growth, and strength did not change much. The above results showed that the optimization of strength and ductility in ultra-fined 304 stainless steel can be achieved by appropriate ECAP plus annealing processes.

Preliminary Study of Manufacturing Technique Using Polyester/Stainless Steel Composite Braid for an Artificial Bone Scaffold

2012 ◽  
Vol 550-553 ◽  
pp. 1253-1257
Author(s):  
Ching Wen Lou ◽  
Shih Peng Wen ◽  
Jin Jia Hu ◽  
Yueh Sheng Chen ◽  
Yi Shin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Stainless Steel ◽  
Stress Shielding ◽  
Gear Ratio ◽  
304 Stainless Steel ◽  
Shielding Effect ◽  
Bone Scaffold ◽  
Artificial Bone ◽  
Tooth Number

In this study, polyester (PET) fiber and 304 stainless steel (SS) wires are twisted and then braided into multi-layer braids on a braiding machine, forming PET/SS composite braids. The braids form the artificial bone scaffold whose mechanical properties are tested and found to be acceptable and with good biocompatibility. However, scaffold made from polymer does not provide enough strength; thus, PET fibers are combined with SS wires to promote scaffold’s mechanical properties and reduce the stress shielding effect. According to the test results, the braid angle increases with an increase in the number of teeth on the braiding gear; by contrast, tensile strength increases with a decrease in tooth number. In particular, when the gear ratio of the take-up gear to the braid gear is 90:50, the resulting braids yield the optimum tensile strength.

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