In its production of cast components, AEP uses a significant amount of nitrogen for isothermal annealing
and ferritic nitrocarburizing.
Among the topics there are the comparative Mossbauer analysis of the superfine structure of Hadfield steel under different kinds of severe deformation, the isochronal and isothermal annealing
of wrought aluminum alloy, the quantitative analysis of fiber fracture in powder injection molded metal composites, the characterization and properties of copper-silica sand nanoparticle composites, modeling three-dimensional moving heat sources in a semi-infinite medium and applications to submerged arc welding, and self-diffusion in nano zinc sulphide.
Recently investigated spheroidization processes can be divided into four groups: isothermal annealing
at a temperature slightly below [A.
The condensates were investigated in the initial condition and after heat treatment, isothermal annealing
in vacuum at T = 650[degrees]C, for 2 h.
For example, the Universal Instruments Consortium observed that, upon isothermal annealing
at 150[degrees]C, some SnAgCu (SAC) solder joints showed increased void formation at the interface between the Cu-Sn intermetallic layer and the copper plating.
Changes in the polymer microstructure have been induced by well-defined thermal histories, namely, isothermal annealing
experiments upon cooling from the melt and subsequent heating linear ramps.
The part required subsequent isothermal annealing
and shot blasting.
a) Isothermal annealing
at temperature slightly under [A.
Produced ingots of steel R6M5 (EBCHR) were subjected to homogenization isothermal annealing
according to the scheme: austenization--heating up to 880-900 [degrees]C, seasoning for 3 h (eutectoid transformation), cooling down to 760-780 [degrees]C, isothermal seasoning for 6 h (diffusion transformation) with subsequent slow cooling with furnace down to 400 [degrees]C.
It was found that a very small broad endotherm appears below the crystallization temperature for samples crystallized at above 90[degrees]C, which suggests that further crystallization had occurred in the remnant amorphous regions during the cooling and heating processes after the isothermal annealing
Previous studies performed on this class of materials produced by isothermal annealing
revealed that annealing-induced changes of the mechanical properties are closely connected with the free-volumes reduction (Allia et al.
Transition Properties of Z 8000B as a Function of Isothermal Annealing