Mechanical Properties of Interface of Heterogeneous Diffusion Welds of Titanium and Austenitic Steel

Kolařík, Ladislav; Kolaříková, Marie; Vondrouš, Petr

doi:10.4028/www.scientific.net/kem.586.178

Cited by 10 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The laser weld joints became porous as a consequence of the Mg content and its evaporation, which caused the formation of gas bubbles and instability of the keyhole. Surface preparation decreases the hydrogen source, which causes porosity [62]. Xu et al observed that with the increase in shielding gas flow rate, the electron temperature of plasma plume increases in the maintenance phase.…”

Section: Appearance Of Laser Weldsmentioning

confidence: 99%

The Effect of Process Parameters on the Microstructure and Mechanical Properties of AW5083 Aluminum Laser Weld Joints

Vyskoč

Dománková

Jurči

et al. 2020

Metals

View full text Add to dashboard Cite

In this article, the effect of process parameters on the microstructure and mechanical properties of AW5083 aluminum alloy weld joints welded by a disk laser were studied. Butt welds were produced using 5087 (AlMg4.5MnZr) filler wire, with a diameter of 1.2 mm, and were protected from the ambient atmosphere by a mixture of argon and 30 vol.% of helium (Aluline He30). The widest weld joint (4.69 mm) and the highest tensile strength (309 MPa) were observed when a 30 L/min shielding gas flow rate was used. Conversely, the narrowest weld joint (4.15 mm) and the lowest tensile strength (160 MPa) were found when no shielding gas was used. The lowest average microhardness (55.4 HV0.1) was recorded when a 30 L/min shielding gas flow rate was used. The highest average microhardness (63.9 HV0.1) was observed when no shielding gas was used. In addition to the intermetallic compounds, β-Al3Mg2 and γ-Al12Mg17, in the inter-dendritic areas of the fusion zone (FZ), Al49Mg32, which has an irregular shape, was recorded. The application of the filler wire, which contains zirconium, resulted in grain refinement in the fusion zone. The protected weld joint was characterized by a ductile fracture in the base material (BM). A brittle fracture of the unshielded weld joint was caused by the presence of Al2O3 particles. The research results show that we achieved the optimal welding parameters, because no cracks and pores were present in the shielded weld metal (WM).

show abstract

Section: Appearance Of Laser Weldsmentioning

confidence: 99%

The Effect of Process Parameters on the Microstructure and Mechanical Properties of AW5083 Aluminum Laser Weld Joints

Vyskoč

Dománková

Jurči

et al. 2020

Metals

View full text Add to dashboard Cite

show abstract

“…A possible reason for the formation of pores in the WM is the instability of the steam-gas channel during the welding process. Elements with a low melting point, in our case Mg, evaporate during laser welding and are trapped in the WM, promoting porosity formation [44]. According to Kuo et al [45], Al 2 O 3 is hygroscopic and absorbs ambient moisture.…”

Section: Computed Tomographymentioning

confidence: 84%

Influence of shielding gases on porosity during laser welding of AZ31B magnesium alloy

Vyskoč¹

2021

View full text Add to dashboard Cite

The paper deals with the evaluation of the shielding gases' influence on the porosity of AZ31B magnesium alloy weld joints produced with disk laser. Butt weld joints were produced under different shielding gas types, namely Ar 4.6, He 4.6, Ar + 5 vol.% He, Ar + 30 vol.% He. Light and electron microscopy, computed tomography, microhardness measurements, and tensile testing were used to evaluate weld joint properties. He shielded weld joints were the narrowest ones (1.79 mm). On the other hand, Ar shielded weld joints exhibited the largest weld width (2.11 mm). The choice of shielding gas had a significant influence on the porosity level of welds. The lowest porosity was observed in weld joint produced in Ar 4.6 shielding atmosphere (only 0.05 mm 3 ), while the highest level of porosity was detected in weld joint produced in pure He 4.6 (0.41 mm 3 ). K e y w o r d s : laser welding, AZ31B magnesium alloy, AZ61 filler wire, porosity

show abstract

“…For AISI 304 steel, the diffusion zone width can generally be determined for temperatures (T) in the range of 1223.15 to 1423.15 K and for times (t) in the range of 1 to 5 h, according to Equation (19).…”

Section: Discussionmentioning

confidence: 99%

“…The largest differences were at 950 • C. Although the deviation from the real value seems to be quite high, the real difference in diffusion zone width at 950 • C is a maximum of 6.7 µm. (6) The diffusion zone width, and therefore the basic information for optimizing the interlayer thickness, can be determined with sufficient accuracy for AISI 304 steel generally for temperatures (T) in the range 1223.15-1423.15 K and for times (t) in the range 1 to 5 h according to Equation ( 18) and for AISI 316L steel according to Equation (19).…”

Section: Discussionmentioning

confidence: 99%

Kinetics of Nickel Diffusion into Austenitic Stainless Steels AISI 304 and 316L and Calculation of Diffusion Coefficients

Bukovská,

Moravec,

Švec

2023

Materials

View full text Add to dashboard Cite

Diffusion bonding has many advantages, but it also has its specifics. When creating heterogeneous joints, problems arise with the creation of intermetallic phases. For this reason, an interlayer is needed to prevent the creation of these unfavorable phases. It is important to ensure that the interlayer is of sufficient thickness to prevent the elements from diffusing through the entire interlayer and the intermetallic phases from being formed again. Conversely, too thick an interlayer causes an increase in the heterogeneity of the bond properties. The creation of the initial diffusion bonds in a heterogeneous diffusion joint of AISI 304 and AISI 316L steel with a 0.2 mm thick nickel interlayer was made in a Gleeble 3500. The experiments to determine the diffusion kinetics were carried out in a vacuum furnace, with subsequent evaluation by EDX (Energy Dispersive X-ray Spectroscopy) analysis. Subsequently, the diffusion coefficients of nickel into both steels were determined, and generalized equations were formulated to calculate the diffusion coefficients for temperatures in the range of 950 to 1150 °C and holding times in the range of 3600 to 18,000 s. Equations are also given to determine the width of the diffused zone between each steel and the Ni interlayer.

show abstract

Mechanical Properties of Interface of Heterogeneous Diffusion Welds of Titanium and Austenitic Steel

Cited by 10 publications

References 6 publications

The Effect of Process Parameters on the Microstructure and Mechanical Properties of AW5083 Aluminum Laser Weld Joints

The Effect of Process Parameters on the Microstructure and Mechanical Properties of AW5083 Aluminum Laser Weld Joints

Influence of shielding gases on porosity during laser welding of AZ31B magnesium alloy

Kinetics of Nickel Diffusion into Austenitic Stainless Steels AISI 304 and 316L and Calculation of Diffusion Coefficients

Contact Info

Product

Resources

About