a class of austenitic high-manganese steels which can deform both by glide of individual dislocations and mechanical twinning (see: twinning, mechanical twinning), suure mangaanisisaldusega austeniitteras, mille plastse deformatsiooni mehhanismideks on nii dislokatsioonide libisemine kui ka mehaaniline kahestumine (vt kahestumine, mehaaniline kahestumine)