1 t , \ • NASA-CR-174957 19850025227 August 1985 CR-174957 Contract NAS3-23940 ELEVATED TEMPERATURE CRACK GROWTH ANNUAL REPORT Prepared By J.F. Yau S.N. Malik K.S. Kim R.H. VanStone J.H. Laflen Approved By M.L. Roberts, Technical Manager J.A. McKenzie, Program Manager Prepared for National Aeronautics and Space Administration Lewis Research Center 21000 Brookpark Road Cleveland, Ohio 44135 GENERAL. ELECTRIC Aircraft Engine Business Group Advanced Technology Programs Dept. Cincinnati, Ohio 45215 I\JI\S/\ I 111111111111111111111111111111111111111111111 I NF01226 \