(PDF) Welding metallurgy Crystallization of metals in welded …
2021年1月1日 · Direct relationships between (1) weld metal oxygen and inclusion content and (2) inclusion density and weld metal microstructure were established in this investigation, explaining why it is ...
Structure of a Welded Joint of Directedly Crystallized Metal Based …
2014年6月12日 · The aim of the present work was to study the structure of a welded joint produced by argon arc welding with the use of a composite electrode wire of a directedly crystallized alloy based on Ni 3 Al and to determine ways for raising the resistance of welded joints to thermal and force actions.
Oxide Formation Mechanisms in High Manganese Steel Welds
2013年12月7日 · The thermodynamic calculation shows that three major phases were crystallized from liquid oxide (slag) step by step. Galaxite (MnAl 2 O 4) spinel first nucleates at approximately 1553 K (1280 °C). As the temperature decreases, tephroite (Mn 2 SiO 4) and MnS precipitate at approximately 1443 K (1170 °C).
A conceptual change in crystallisation mechanisms of oxide materials ...
2020年10月27日 · Specifically, crystallisation occurring in closed systems are largely unproven. Combining coherent experimental data, we here demonstrate a fundamental nucleation-growth mechanism that occurs in a...
Physical Metallurgy Crystallization of metals in welded joints ...
2021年12月4日 · The primary purpose of the work was to investigate the possibility of regional undercooling or supercooling, caused by constitutional supercooling, via weld pool surface temperature measurements...
(PDF) Structure of a Welded Joint of Directedly Crystallized …
2014年5月1日 · The structure of a welded joint obtained by argon-arc welding with the use of a composite electrode wire of a Ni3Al-base alloy after directed crystallization is studied. It is shown that the use...
Effect of laser fusion repair on the microstructure and properties of ...
2023年1月1日 · The microstructure of weld is well crystallized without welding defects, and the weld surface is convex. Fig. 1 (b) shows the magnification morphology of the weld, which shows that the weld center microstructure is primarily from the growth of the molten pool edge to the center of the weld columnar crystals, bulky size.
Elucidating Electrical Conductive Mechanisms for CaF2–SiO2
1 天前 · Electrical conductivity of flux, particularly in a liquid state, plays significant roles in optimizing arc and molten pool behaviors pertinent to submerged arc welding. However, the effects of crystallization on flux electrical conductivity remain less clear. Here, the relationship between electrical conductivity of CaF2–SiO2–Al2O3–MgO fluxes with varying Al2O3/MgO ratios between 0.51 ...
Joining of Ti-based bulk metallic glasses using resistance spot welding …
2012年8月1日 · Spot weld size and crystallized volume fraction were found to interact in a complex fashion in controlling the joint mechanical response. Assessment of cooling rates indicated that crystallized volume fraction was more liable to reach significant levels in the heat-affected zone than the fusion zone.
Crystallization of dissimilar Ti/Cu/steel laser welds
2019年11月15日 · The crystallization mechanisms of the weld material govern the structure and strength of welded joints and require a detailed study. This study shows that laser radiation power and welding speed influence crystal forms of welds joining a titanium alloy and a chromium-nickel steel through a copper insert, their structure and tensile strength.
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