Sicong Zhang , Yue Zhao , Quan Li , Zhandong Wan , Aiping Wu
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Influence of gas protection on porosity distribution and mechanical properties of 2195-T8 Al-Li alloy tungsten inert gas welded joints
In this study, 2195-T8 Al-Li alloy joints were welded by tungsten inert gas (TIG) welding with three different gas protection strategies. The porosity distribution of the joints was quantified by Computed tomography (CT), and the tensile properties of the joints were evaluated. The results indicate that with appropriate back gas protection, the average ultimate tensile strength and elongation of the joints reach 396 MPa and 5.0 %, respectively, increased by 9.6 % and 47.1 % compared to the joints without back gas protection. Back gas protection effectively reduces porosity at the weld root, thereby preventing crack initiation from here during the tensile test.
期刊介绍：
Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review.
Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials.
Contributions include, but are not limited to, a variety of topics such as:
• Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors
• Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart
• Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction
• Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots.
• Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing.
• Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic
• Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive
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