TY - RPRT TI - Report no. 23- residual stress detection in railroad wheels : an ultrasonic system using EMATS AU - Schramm, Raymond E AU - Clark, Alfred V AU - Mitrakovic, Dragan V AU - Schaps, Stephen R AU - McGuire, Todd J PY - 1991 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST IR 3968 DO - 10.6028/NIST.IR.3968 ER -