Magnesium　alloy　AZ31B　plates　were　soldered　by　means　of　high-frequency　induction　soldering　using　a　Zn-Al　filler　metal　in　argon　gas　shield　condition.　The　interfacial　microstructure　and　phase　constitution　of　the　soldered　joint　were　investigated.　The　experimental　results　show　that　alpha-Mg　solid　solution　and　alpha-Mg　+　MgZn　eutectoid　structure　were　formed　in　soldering　region.　Moreover,　the　zinc　solid　solution　and　the　aluminum　solid　Solution　in　the　original　filler　metal　disappeared　completely　after　the　soldering　process.　Test　results　indicate　that　the　shear　strength　of　the　soldered　joint　is　19　MPa.　The　fracture　morphology　of　the　soldered　joint　exhibits　intergranular　fracture　mode　and　the　crack　originates　from　alpha-Mg　+　MgZn　eutectoid　structure.　(C)　2009　Elsevier　B.V.　All　rights　reserved.