Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
}
TY - GEN
T1 - Genetic alloy design of ultra high strength stainless steels
T2 - 6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009
AU - Rivera-Díaz-del-Castillo, P. E J
AU - Xu, Wei
AU - Van Der Zwaag, Sybrand
PY - 2010
Y1 - 2010
N2 - The design of novel ultra high strength steels for aerospace applications is subjected to stringent requirements to ensure their performance. Such requirements include the ability to withstand high loads in corrosive environments subjected to temperature variations and cyclic loading. Achieving the desired performance demands microstructural control at various scales; e.g. fine lath martensite is desired in combination with nanoprecipitate networks at specified volume fractions, and controlled concentrations of alloying elements to prevent alloy embrittlement. The design for a specified microstructure cannot be separated from the processing route required for its fabrication. Alloys displaying exceptional properties are subjected to complex interactions between microstructure and processing requirements, which can be described in terms of evolutionary principles. The present work shows how genetic alloy design principles have been utilised for designing stainless steels displaying strength exceeding that of commercial counterparts. Such designed alloys become feasible for fabrication by tailoring their microstructure employing thermodynamic and kinetic principles, while fracture toughness properties can be controlled via performing quantum mechanical cohesion energy computations.
AB - The design of novel ultra high strength steels for aerospace applications is subjected to stringent requirements to ensure their performance. Such requirements include the ability to withstand high loads in corrosive environments subjected to temperature variations and cyclic loading. Achieving the desired performance demands microstructural control at various scales; e.g. fine lath martensite is desired in combination with nanoprecipitate networks at specified volume fractions, and controlled concentrations of alloying elements to prevent alloy embrittlement. The design for a specified microstructure cannot be separated from the processing route required for its fabrication. Alloys displaying exceptional properties are subjected to complex interactions between microstructure and processing requirements, which can be described in terms of evolutionary principles. The present work shows how genetic alloy design principles have been utilised for designing stainless steels displaying strength exceeding that of commercial counterparts. Such designed alloys become feasible for fabrication by tailoring their microstructure employing thermodynamic and kinetic principles, while fracture toughness properties can be controlled via performing quantum mechanical cohesion energy computations.
KW - Alloy design
KW - Genetic algorithms
KW - Marageing steels
KW - Quantum mechanics
KW - Thermodynamics
U2 - 10.4028/www.scientific.net/MSF.638-642.3473
DO - 10.4028/www.scientific.net/MSF.638-642.3473
M3 - Conference contribution/Paper
AN - SCOPUS:75849138189
SN - 0878492941
SN - 9780878492947
VL - 638-642
T3 - Materials Science Forum
SP - 3473
EP - 3478
BT - THERMEC 2009
Y2 - 25 August 2009 through 29 August 2009
ER -