Electron-Beam Welding - Structural-Phase State and Microhardnes in the Weld Zone in a Submicrocrystalline Titanium Alloy Grade2

Abstract

The paper presents the results of the X-ray diffraction analysis of structural-phase states in the weld zone of a titanium alloy Grade2 in micro-and submicrocrystalline states. It is established that the structural-phase state in the weld zone and in the heat-affected zone depends on the state of samples of the alloy Grade2 before welding. It is shown that formation process of metastable phases ω-Ti and α′′-Ti occurs in the submicrocrystalline state in the alloy Grade2 in the weld zone and in the heat-affected zone. Investigations of the features of the microhardness distribution in the weld zone in alloys Grade2 in micro-and submicrocrystalline states are carried out. Different character of microhardness distributions in the weld zone in the samples depending on the structural-phase state of welded plates made of alloy Grade2 is determined.

The Influence of Welding Mode on the Structural-Phase State of Steel 0.12С-18Cr-10Ni-1Ti-Fe at Welding by Modulated Current

“…Solving these objectives is based on the awareness on the processes that determine the formation and properties of various types of welding. There are currently known many different types of welding [1][2][3][4][5][6][7][8][9][10][11][12][13]. Each of them has its strengths and shortcomings.…”

Structural Phase Changes in Heat-Affected Zone of 0.12C-1CR-10NI-1TI-FE Steel After Modulated Current Welding

“…Вопросам повышения качества сварных соединений во всем мире уделяется все больше внимания. Разрабатываются все новые способы сварки [1][2][3][4][5][6][7][8][9][10][11][12][13][14] неразрушающих и разрушающих испытаний, так как надежность сварных соединений существенно влияет на безопасность и экономическую эффективность различных производств. Тем не менее до сих пор одним из самых распространенных способов является ручная дуговая сварка плавящимися металлическими электродами, которая может быть выполнена в любых труднодоступных местах, обеспечивая хорошее качество сварных швов [15][16][17].…”