Study on CO2 laser weldability of Fe-Mn-Si shape memory alloy

Zhou, Chaoyu; Chen, Lin; Liu, Linlin

doi:10.1117/12.921518

Cited by 6 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Welding is another important aspect for engineering application of Fe-SMA. Although the applicability of different welding technologies such as tungsten-inert gas, laser beam, and electron beam welding have been studied [ 158 , 159 , 160 , 161 , 162 ], some crucial welding properties and technologies are still under investigation. For example, in most of the existing experiments, Fe-SMA was welded to Fe-SMA or austenitic stainless steel in which the base metal shares the same metallography (γ-austenite).…”

Section: Further Research Needsmentioning

confidence: 99%

Iron-Based Shape Memory Alloys in Construction: Research, Applications and Opportunities

Zhang

et al. 2022

Materials

View full text Add to dashboard Cite

As a promising candidate in the construction industry, iron-based shape memory alloy (Fe-SMA) has attracted lots of attention in the engineering and metallography communities because of its foreseeable benefits including corrosion resistance, shape recovery capability, excellent plastic deformability, and outstanding fatigue resistance. Pilot applications have proved the feasibility of Fe-SMA as a highly efficient functional material in the construction sector. This paper provides a review of recent developments in research and design practice related to Fe-SMA. The basic mechanical properties are presented and compared with conventional structural steel, and some necessary explanations are given on the metallographic transformation mechanism. Newly emerged applications, such as Fe-SMA-based prestressing/strengthening techniques and seismic-resistant components/devices, are discussed. It is believed that Fe-SMA offers a wide range of applications in the construction industry but there still remains problems to be addressed and areas to be further explored. Some research needs at material-level, component-level, and system-level are highlighted in this paper. With the systematic information provided, this paper not only benefits professionals and researchers who have been working in this area for a long time and wanting to gain an in-depth understanding of the state-of-the-art, but also helps enlighten a wider audience intending to get acquainted with this exciting topic.

show abstract

Section: Further Research Needsmentioning

confidence: 99%

Iron-Based Shape Memory Alloys in Construction: Research, Applications and Opportunities

Zhang

et al. 2022

Materials

View full text Add to dashboard Cite

show abstract

“…In the case of SMA plates, the joining and welding of SMA plates to each other and also to the steel components is somehow challenging; and the ideal joining technology may not be readily available in the industry at the present time. Laser welding followed by annealing treatment (Lin et al 2000), cross-flow laser welding (Zhou et al 2011), utilizing additives in the welding process (Zhao et al 2010), and brazing techniques with laser (Santos et al 2013) are some of the proposed measures could be taken to solve this issue, yet more development is required to achieve a suitable and economically feasible welding technology. However, the condition seems to be better in the case of iron-based SMAs in that Alam et al (2007) pointed out Fe-Mn-Si SMAs demonstrate good weldability compared with Ni-Ti.…”

Section: Smasmentioning

confidence: 99%

Shape memory alloy-based moment connections with superior self-centering properties

Farmani¹,

Ghassemieh²

2016

Smart Mater. Struct.

View full text Add to dashboard Cite

Superelastic shape memory alloys (SMAs) have the potential to create a spontaneous recentering mechanism on the connections of a structural system under seismic actions, which results in mitigation of the damage in the main structural members. In this article, innovative types of steel beam-to-column moment connections incorporating SMA bolts and plates are introduced and studied through a numerical approach. First, SMA bolted end-plate connection model is produced and analyzed by means of the finite element method to validate the numerical analysis against the prior experimental results. Then, the performance of eleven different end-plate moment connection models subjected to cyclic loading is investigated. By selecting the lower values for the moment capacity based on bolts strength in comparison to the flexural resistance of the beam, the plastic hinge is transferred from the beam section to the beam-column interface. Hence, employing superelastic materials at the connection interface could be potentially effective in providing the desired self-centering effect in the connection. To this end, the impact of utilizing superelastic SMA bolts and end-plates instead of using the conventional structural steel on the overall cyclic response of the connections is evaluated in this study. Results show that extended end-plate connections equipped with SMA bolts and end-plates, if properly proportioned and detailed, not only exhibit a clear reduction in the residual drifts after a seismic event, but also can meet the ductility requirements with good energy dissipation and sufficient stiffness.

show abstract

“…Lin et al (2000) showed that Fe-based SMAs can be laser welded; however, it should be followed by annealing treatment. Zhou et al (2011) reported on the joining of Fe-based SMA using crossflow laser welding. They used optimal welding processing parameters and observed that the tensile strength of the welded Fe-based joint can achieve 93.5% of the base material strength.…”

Section: Limitations Of This Applicationmentioning

confidence: 99%

Feasibility study of utilizing superelastic shape memory alloy plates in steel beam–column connections for improved seismic performance

Moradi

Alam

2014

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

Steel moment-resisting frames are prone to extensive damage in seismically active zones. Large permanent deformations in structural members following strong earthquakes can be mitigated using smart materials such as shape memory alloys. In this article, three-dimensional finite element analyses are conducted to study the seismic performance of beamcolumn connections incorporating shape memory alloy plates. Eight beam-column connection subassemblies with shape memory alloy plates in the plastic hinge of beam were analyzed under cyclic loading. Based on the numerical results, the recentering properties of superelastic shape memory alloy plates were found to be effective in reducing the residual drifts of a flange plate beam-column connection, while displaying an excellent ductility. In addition, shape memory alloy plates could prevent the occurrence of local buckling and damage in structural members. The new self-centering connections could also exhibit a good energy dissipation capability.

show abstract

Study on CO2 laser weldability of Fe-Mn-Si shape memory alloy

Cited by 6 publications

References 0 publications

Iron-Based Shape Memory Alloys in Construction: Research, Applications and Opportunities

Iron-Based Shape Memory Alloys in Construction: Research, Applications and Opportunities

Shape memory alloy-based moment connections with superior self-centering properties

Feasibility study of utilizing superelastic shape memory alloy plates in steel beam–column connections for improved seismic performance

Contact Info

Product

Resources

About