The change in phase transformation temperatures under different heating/cooling rate should be considered for selecting the process parameter (heat treatment, HIP or casting) for manufacturing Ni-base superalloy components. The DSC experiment was carried out on PM625 superalloy powders with different particle size range (0-355μm), the results indicated that the particle size had minor effect on liquidus and solidus temperatures of DSC heating curves, the differences were less than 2☌. Besides the average value method, the liquidus temperature of the alloy (0☌/min) can also be obtained by method of linear-fit/extrapolating from 5-40☌/min heating/cooling rates or inflection point deviate from the baseline of DSC cooling curves which could minimize the heating/cooling rate effects. However, the average values of specific peaks of heating and cooling curves are relatively consistent which is close to the equilibrium phase change temperatures of the alloy and makes the results comparable. The heating and cooling DSC curves shifted to high and low temperature direction respectively, accompanied by the heating/cooling rate increased. The results indicated that the heating/cooling rate had obvious effect on the DSC results of the phase transformation temperatures of liquidus, MC carbides, solidus, eutectic (γ+γ′) and secondary γ′. The DSC experiment with different heating/cooling rates (5-40☌/min) was performed on DS superalloy DZ22.
![jmatpro price jmatpro price](https://img.yumpu.com/34810096/1/190x245/download-jmatpro.jpg)
The phase change in both heating (melting) and cooling (solidification) process was investigated by DSC on DZ22 test bar and PM625 alloy powders respectively. However, only γ matrix was found in PM625 alloy powders. The minor phases, such as MC, eutectic γ′ and Ni 5Hf, and γ matrix with secondary γ′ existed in as-cast microstructure of DS DZ22. This work provides a deep simulation insight into the GA process, towards producing high-quality metal powders for additive manufacturing on a large scale.The phase transformations of the directionally solidified (DS) and powder metallurgy (PM) Ni-base superalloys were investigated by JMatPro, synchrotron XRD (SXRD) and differential scanning calorimetry (DSC).
![jmatpro price jmatpro price](https://www.mdpi.com/metals/metals-11-01124/article_deploy/html/images/metals-11-01124-g006.png)
Finally, the possible measures to reduce the defects of the powders have been put forward based on the revealed mechanism of defect evolution.
#Jmatpro price software
A key advantage of the JMatPro software is that it allows the calculation of the. The estimated morphology and size distribution of the particles have a good agreement with the experimental ones. Title of the Paper: Prediction of the Price Cap under RPI-X Incentive.
![jmatpro price jmatpro price](https://www.tenable.com/sites/drupal.dmz.tenablesecurity.com/files/images/blog/VNC-Result-Actual-Screenshot.png)
Moreover, the irregular powder is produced when the drag force is not enough to separate the droplets but deforms them. While the presence of the satellite powder is caused by the collisions between the large and small droplets with different velocities. Simulation results show that the Kelvin-Helmholtz instability in the primary atomization and the membranous droplet breakup and closure in secondary atomization can form the hollow powder. In this paper, the GA process is first modeled by combining the volume of fluid (VOF) model with dynamic adaptive mesh and the discrete phase model (DPM) to simulate the formation of the powders and the evolution of the defects. Due to the high efficiency and low cost, gas atomization (GA) has been widely applied to produce metal powders.