Incorrect materials selection as a cause of environmentally assisted cracking
May 29-June 3, 2016
Selecting materials for structures and components involves consideration of numerous factors, including material properties, e.g. strength-to-weight ratio, resistance to fatigue, fracture, and various types of corrosion, as well as fabricability, cost, and availability. Choosing materials with ideal combinations of properties is usually not possible so that compromises are required, and failures often occur when due consideration is not given to (i) the effects of environment under the full range of operating conditions, and (ii) the effects of heat treatment on environmentally assisted cracking. Some examples of the above issues are described and discussed so that similar failures can be avoided in the future. Stress corrosion cracking of aluminium alloys is discussed in particular.
Stan Lynch, "Incorrect materials selection as a cause of environmentally assisted cracking" in "International Workshop on the Environmental Damage in Structural Materials Under Static Load/Cyclic Loads at Ambient Temperatures", A.K. Vasudevan, Office of Naval Research (retired), USA Ronald Latanision, Exponent, Inc., USA Henry Holroyd, Luxfer, Inc. (retired) Neville Moody, Sandia National Laboratories, USA Eds, ECI Symposium Series, (2016). http://dc.engconfintl.org/edsm/2