TY - GEN
T1 - THE MECHANICS OF HYDRIDE FORMATION AND EMBRITTLEMENT
AU - Lufrano, J.
AU - Sofronis, P.
AU - Birnbaum, H. K.
N1 - Publisher Copyright:
© 1997 American Society of Mechanical Engineers (ASME). All rights reserved.
PY - 1997
Y1 - 1997
N2 - Transient hydrogen diffusion and hydride formation coupled with material deformation are studied in a hydride forming system. The concept of terminal solid solubility of hydrogen as affected by stress i s described and the mode of hydrogen diffusion through the two-phase material (mattix-i-hydride) is discussed. Probabilistic precipitation of hydride is modeled in the neighborhood of a crack tip under mode I plane strain loading and a uniform initial hydrogen concentration below the stress free terminal solid solubility. A full transient finite element analysis allows for numerical monitoring of the development and expansion of the hydride zone. Information about the shape, size, and density of the hydride in the hydride zone is obtained. The mechanistic effects of the solute hydrogen and hydride formation on the stresses at the crack tip are analyzed and their consequence on the fracture toughness resistance of the material is calculated.
AB - Transient hydrogen diffusion and hydride formation coupled with material deformation are studied in a hydride forming system. The concept of terminal solid solubility of hydrogen as affected by stress i s described and the mode of hydrogen diffusion through the two-phase material (mattix-i-hydride) is discussed. Probabilistic precipitation of hydride is modeled in the neighborhood of a crack tip under mode I plane strain loading and a uniform initial hydrogen concentration below the stress free terminal solid solubility. A full transient finite element analysis allows for numerical monitoring of the development and expansion of the hydride zone. Information about the shape, size, and density of the hydride in the hydride zone is obtained. The mechanistic effects of the solute hydrogen and hydride formation on the stresses at the crack tip are analyzed and their consequence on the fracture toughness resistance of the material is calculated.
UR - http://www.scopus.com/inward/record.url?scp=85127229232&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85127229232&partnerID=8YFLogxK
U2 - 10.1115/IMECE1997-0542
DO - 10.1115/IMECE1997-0542
M3 - Conference contribution
AN - SCOPUS:85127229232
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
SP - 261
EP - 271
BT - Recent Advances in Solids/Structures and Application of Metallic Materials
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 1997 International Mechanical Engineering Congress and Exposition, IMECE 1997 - Recent Advances in Solids/Structures and Application of Metallic Materials
Y2 - 16 November 1997 through 21 November 1997
ER -