An alloy pipe and a method for producing the same are disclosed. The alloy pipe of the present invention contains, as a component composition, in terms of % by mass, Cr: 11.5-35.0%, Ni: 23.0-60.0%, and Mo: 0.5-17.0%, has an austenitic phase as a microstructure, has a Mo concentration (% by mass) in a grain boundary of the austenitic phase that is 4.0 times or less than a Mo concentration (% by mass) within grains of the austenitic phase, and has a tensile yield strength in a pipe axial direction of 689 MPa or more and a ratio (compressive yield strength in a pipe axial direction)/(tensile yield strength in a pipe axial direction) of 0.85 to 1.15.

Methods for controlling properties of structural elements of implantable medical devices, where the structural elements contain shape memory alloys (SMAs) include promoting or inhibiting in vivo formation of R-phase crystal structure or converging or separating the R-phase from the austenite phase.

Methods for controlling properties of structural elements of implantable medical devices, where the structural elements contain shape memory alloys (SMAs) include promoting or inhibiting in vivo formation of R-phase crystal structure or converging or separating the R-phase from the austenite phase.

A sandwich structure forming method including the steps of (1) providing a sandwich structure comprising a core positioned between a first liner sheet and a second liner sheet; (2) positioning the sandwich structure into a cavity of a die assembly; and (3) pressurizing the core to expand the sandwich structure into engagement with the die assembly.

In a Ni-base alloy, an area-equivalent diameter D is calculated. D is defined by D=A.sup.1/2 from an area A of a largest nitride in a field of view when an observation area S.sub.0 is observed. This process is repeated in n fields of view for measurement, where n is the number of the fields of view for measurement, so as to acquire n pieces of data on D, and the pieces are arranged in ascending order D.sub.1, D.sub.2, . . . , D.sub.n to obtain a reduced variate y.sub.j. The obtained values are plotted on X-Y axis coordinates, where an X axis corresponds to D and a Y axis corresponds to y.sub.j. In a regression line y.sub.j=a×D+b, y.sub.j is obtained when a target cross-sectional area S is set to 100 mm.sup.2. When the obtained y.sub.j is substituted into the regression line, the estimated nitride maximum size is ≦25 μm in diameter.

In a Ni-base alloy, an area-equivalent diameter D is calculated. D is defined by D=A.sup.1/2 from an area A of a largest nitride in a field of view when an observation area S.sub.0 is observed. This process is repeated in n fields of view for measurement, where n is the number of the fields of view for measurement, so as to acquire n pieces of data on D, and the pieces are arranged in ascending order D.sub.1, D.sub.2, . . . , D.sub.n to obtain a reduced variate y.sub.j. The obtained values are plotted on X-Y axis coordinates, where an X axis corresponds to D and a Y axis corresponds to y.sub.j. In a regression line y.sub.j=a×D+b, y.sub.j is obtained when a target cross-sectional area S is set to 100 mm.sup.2. When the obtained y.sub.j is substituted into the regression line, the estimated nitride maximum size is ≦25 μm in diameter.

Nickel-base composite niobium bearing alloys including delta and/or eta strengthening phases in addition to gamma prime precipitates in a gamma matrix.

Nickel-base composite niobium bearing alloys including delta and/or eta strengthening phases in addition to gamma prime precipitates in a gamma matrix.

The disclosure is directed to Ni-based glass-forming alloys bearing Cr and P, wherein the Cr atomic concentration is greater than 7 percent and the P atomic concentration is greater than 12 percent, and methods of fluxing such alloys such that their glass-forming ability is enhanced with respect to the glass-forming ability associated with their unfluxed state.

The disclosure is directed to Ni-based glass-forming alloys bearing Cr and P, wherein the Cr atomic concentration is greater than 7 percent and the P atomic concentration is greater than 12 percent, and methods of fluxing such alloys such that their glass-forming ability is enhanced with respect to the glass-forming ability associated with their unfluxed state.