TY - RPRT TI - Study of initial stages of wear by electron channeling I. Measurement of plastic strain in copper due to sliding wear II. Quantitative methods in wear debris analysis AU - Ruff, A W PY - 1976 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 76-1141 DO - 10.6028/NBS.IR.76-1141 ER -