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Hot deformation behaviors of a solution-treated Ni-based superalloy are investigated. There are two types of hot compressive tests. Type A means that the strain rate keeps constant, while Type B denotes that the strain rate firstly keeps a high value in stage I, then a low one in stage II. It can be found that the deformation parameters and deformation history have great effects on the flow behavior...
The dynamic recrystallization (DRX) behavior of 42CrMo steel was studied by hot compressive tests and cellular automaton (CA) simulation. The experimental results showed that initial grain size besides deformation parameters has an obvious influence on dynamic recrystallization (DRX) behavior. It is found that the initial grain size not only influences the number of DRX nucleation site, but also the...
To investigate the hot deformation behaviors of a nickel-based superalloy, the hot compressive tests are conducted at the deformation temperature range of 920–1040 °C and strain rate range of 0.001-1s−1. It is found that the effects of strain rate and deformation temperature on the grain boundary maps are significant. An almost competed dynamic recrystallization (DRX) microstructure occurs at relatively...
Powder metallurgy Cu–1Cr–0.65Zr (wt%) alloy was fabricated using Cu, Cr, and ZrH2 powders as initial materials by hot pressing at 950 °C for 4 h under 27.7 MPa. Microstructure was observed by scanning electron microscope (SEM) and transmission electron microscope (TEM). Mechanical and electrical properties were also analyzed. It was found that an appropriate heating treatment could result in the formation...
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