Tensile Properties of Electron-Beam-Welded Single Crystals of Molybdenum

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  • 電子ビーム溶接したモリブデン単結晶の引張特性
  • デンシ ビーム ヨウセツシタ モリブデン タンケッショウ ノ ヒッパリ トクセ

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Abstract

The purpose of this study is to investigate the macro- and microstructures and the tensile properties of electron-beam-welded single crystals of molybdenum. The single-crystal sheets were prepared by means of secondary recrystallization. The welding was carried out by a melt-run technique.<BR>The weld metal had the same crystallographic orientation as the base metal, and no grain boundary was observed. However, many large weld pores were formed mostly along the weld bond. The strength and ductility of the welded joints of single crystals were almost the same as those of the base metal (“annealed” single crystals). It is concluded that the joint efficiency of molybdenum single crystals at room temperature or above was excellent and nearly 100%.

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