Influence of ingot structure and properties on the quality of V95pch alloy plates

Zasypkin, V. A.; Leshkov, V. P.; Ruch'eva, N. V.; Setyukov, O. A.; Tsyplukhin, I. P.

doi:10.1007/bf00741935

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“…Service and technological properties of each commercial alloy, including weldability, depend on phase composition and structural state, which, in their turn, are determined by equilibrium diagram. However, during semi-finished product fabrication and, particularly, during their welding, structure forms under the conditions, differing from the equilibrium state [8]. Here, during solidification an over-saturated solid solution and metastable phases are formed in the weld, and solid solution decomposition with precipitation of metastable and stable phases, their coagulation and formation of new solid solution, precipitation of non-equilibrium structural components, including eutectics, take place in the HAZ.…”

Section: Introductionmentioning

confidence: 99%

Scandium Influence on the Structure and Chemical Inhomogeneity of Welded Joints of Al-Zn-Mg-Cu System Alloys

Fedorchuk

Falchenko

2014

AMM

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Structural transformations and formation of chemical inhomogeneity in the weld and HAZ metal in fusion welding of complex alloy of V96 type were studied. It is shown that under the influence of welding heat, partial melting of the alloy phase components proceeds in the heat-affected zone with formation of structures of eutectic origin in the form of extended interlayers along the grain boundaries, causing metal embrittlement. Scandium addition to the alloy enables reducing the solidification processes and degree of segregation along the grain boundaries, as well as localizing partial melting of the grains without formation of coarse eutectic interlayers.

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Section: Introductionmentioning

confidence: 99%