Accession Number : ADA262886
Title : Martensitic Phase Transitions with Surface Effects
Descriptive Note : Technical rept.
Corporate Author : CALIFORNIA INST OF TECH PASADENA DIV OF ENGINEERING AND APPLIED SCIENCE
Personal Author(s) : Lusk, Mark T
Report Date : Jun 1992
Pagination or Media Count : 45
Abstract : A model of martensitic phase transitions is presented that is capable of accounting for a variety of surface effects associated with the localized interaction of coexisting phases of a material. Such phenomena are thought to play a critical role in determining the size, shape and stability of nucleated embryos as well as to affect the conditions under which nucleation occurs. Attention is restricted to transitions that are mechanically induced, and the model can not account for temperature effects. Materials that undergo martensitic phase changes are modeled as hyperelastic in both the bulk and the interface. The characterization of such bodies is examined in detail, and a representation theorem is presented for isotropic, hyperelastic interfaces in terms of two scalar invariants associated with the deformation of the interface.
Descriptors : *DEFORMATION , *PHASE , *SURFACE PROPERTIES , *MARTENSITE , TEMPERATURE , STABILITY , MODELS , SHAPE , NUCLEATION , SURFACES , IRON ORGANIC COMPOUNDS , THEOREMS , SCALAR FUNCTIONS , NAVAL RESEARCH , ISOTROPISM , CERAMIC MATERIALS , BULK MATERIALS , ALLOYS , ELASTIC PROPERTIES , INTERACTIONS , INTERFACES , PHASE TRANSFORMATIONS
Subject Categories : Physical Chemistry
Metallurgy and Metallography
Properties of Metals and Alloys
Distribution Statement : APPROVED FOR PUBLIC RELEASE