Plasticity in multiphase intermetallics

Autor:	Ronald Gibala, Amit Misra
Rok vydání:	2000
Předmět:	Nial Toughness Materials science Mechanical Engineering Metallurgy Metals and Alloys Intermetallic General Chemistry Slip (materials science) Plasticity Fracture toughness Mechanics of Materials Materials Chemistry Composite material Ductility computer computer.programming_language Eutectic system
Zdroj:	Intermetallics. 8:1025-1034
ISSN:	0966-9795
DOI:	10.1016/s0966-9795(00)00079-0
Popis:	We have studied the mechanical behavior of model NiAl-based eutectic composites to gain insight on micromechanisms of plasticity in multiphase intermetallics. We show that in composites where the NiAl matrix and the reinforcing ductile second phase can deform compatibly due to easy slip transfer across interfaces, high room temperature tensile ductility and fracture toughness are obtained. In composites where interfaces are strong barriers to slip transfer and the metallic second phase has high strength and limited ductility, incompatible deformation of the two phases results in negligible tensile ductility and limited toughness enhancement. Factors that affect ease of slip transfer across interfaces are discussed. Calculations of dislocation pile-up stresses are used to predict whether slip is activated prior to cleavage or vice-versa for a given set of respective yield strengths and crystallographic orientation relationships between the two phases.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::238f0fd0f5a5925659f53e4fb39bae4c https://doi.org/10.1016/s0966-9795(00)00079-0 Zobrazit plný text záznamu Full Text from ScienceDirect