22nd Advanced Aerospace Materials and Processes (AeroMat) Conference and Exposition (May 23-25, 2011): COLD-WORK Effect on High Nitrogen STAINLESS STEEL

Tuesday, May 24, 2011: 8:30 AM

Room 306 (Long Beach Convention and Entertainment Center)

Dr. Eun U. Lee , Naval Air Warfare Center Aircraft Division, Patuxent River, MD

Robert E. Taylor , Naval Air Warfare Center Aircraft Division, Patixent River, MD

Nathan McLeese , Naval Air Warfare Center Aircraft Division, Patixent River, MD

The cold-work effect on the properties of high nitrogen stainless steel was studied. Specimens were annealed, and 20% and 50% cold-worked, respectively. Subsequently, they were subjected to microstructure examination, stress corrosion cracking (SCC), mechanical and fatigue tests. The SCC test was conduicted in a 3.5% NaCl solution, the mechanical test in air, and the stress-life (S-N) fatigue and fatigue crack growth tests in air and a 3.5% NaCl solution. The UTS, YS and hardness were simiar to those of Hy-Tuf steel, the fracture toughness was similar to that of 4340 steel, but the SCC resistance was far superior to those of the other steels. However, it was still susceptible to corrosion fatigue in 3.5% NaCl solution. The cold-work induced greater fatigue resistane in air and 3.5% NaCl solution.

See more of: Session 2: High Strength Steels II
See more of: High Strength Steels

HSS2.2 COLD-WORK Effect on High Nitrogen STAINLESS STEEL