Structure and mechanical properties of high-alloy manganese-aluminum steels

Summary form only given, as follows. The authors' study concerns first the influence of 5%Al additions on the structure and mechanical properties of Fe-(23-30)Mn alloys and, second, the strengthening solid solution effect of carbon and silicon additions to the Fe-Mn-Al austenitic alloys. Mechanical properties under uniaxial loading at room temperature and -196 degrees C, Charpy V-notch impacts at -196 degrees C and HV /sub 50/ hardness measurements have been performed. These results are discussed on basis of optical metallographic, scanning and transmission electron microscope examinations. Complementary studies on thermal conductivity have also been performed.Anglai