FILLER MATERIAL, JOINING STRUCTURE BETWEEN MAGNESIUM (Mg) ALLOY MATERIAL AND FILLER MATERIAL, JOINING METHOD BY MELT WELDING OF MAGNESIUM (Mg) ALLOY MATERIAL, MAGNESIUM (Mg) ALLOY MATERIAL JOINING STRUCTURAL BODY, AND MANUFACTURING METHOD OF MAGNESIUM (Mg) ALLOY MATERIAL JOINING STRUCTURAL BODY

PROBLEM TO BE SOLVED: To provide a filler material that can improve mechanical properties of a weld zone of an Mg alloy material, a joining structure between the magnesium (Mg) alloy material and the filler material, a joining method by melt welding of the Mg alloy material, an Mg alloy material joining structural body, and a manufacturing method of the Mg alloy material joining structural body.SOLUTION: A filler material used for joining a plurality of magnesium (Mg) alloy materials containing 50 mass% or more magnesium (Mg) by melt welding is composed of an alloy composition containing 50 mass% or more magnesium (Mg) and 0.01-6.3 mass% silver (Ag) and/or gallium (Ga).SELECTED DRAWING: Figure 1 【課題】Ｍｇ合金材料の溶接部の機械的性質を向上させることが可能な溶加材、マグネシウム（Ｍｇ）合金材料と溶加材との接合構造、Ｍｇ合金材料の溶融溶接による接合方法、Ｍｇ合金材料接合構造体、及びＭｇ合金材料接合構造体の製造方法を提供する。【解決手段】マグネシウム（Ｍｇ）を５０質量％以上含有する複数のマグネシウム（Ｍｇ）合金材料を溶融溶接によって接合する際に用いる溶加材を、マグネシウム（Ｍｇ）を５０質量％以上含有するとともに、０．０１質量％以上６．３質量％以下の銀（Ａｇ）及び／又はガリウム（Ｇａ）を含有する合金組成から構成する。【選択図】図１