Papers by Keyword: Cross Slip

Abstract: In the aluminium wrought alloys, the solid solution strengthening is one of the dominant hardening mechanism. Every solute element shows different strengthening effect. In present work the strengthening effect of different elements in a large temperature range was studied with the microstructure and flow stress model 3IVM+. This model was developed for cell forming metals, in which the work hardening and softening effects due to interaction of dislocation densities are taken into account. Compression tests for various binary aluminium alloys (Al-Mg, Al-Mn, Al-Si) were carried out under various deformation temperatures and strain rates. The contribution of each element to solution strengthening was investigated with 3IVM+. It was found that the dislocation interaction, especially cross slip and climb, is sensitive to the solute type and concentration.

Abstract: This paper summarizes a recent review about the brass-type texture and its deviation from the copper-type texture by the present author and R.K. Ray – with somewhat sharpened conclusions.

Abstract: Both tensile and strain controlled low cycle fatigue (LCF) tests were conducted for 316L and 316LN at 550oC and 600oC to investigate the nitrogen effect on the deformation behavior of type 316L stainless. The waveform of LCF was a symmetrical triangle with a constant strain rate of 4×10-3/s was employed for most tests. It shows that the addition of nitrogen in the alloy results in an increase in tensile strength but a decrease in ductility. Both the alloys exhibited cell structure after severe tensile deformation. However, after low cycle fatigue, only planar slip band is observed in 316LN, whereas cell structure is still the main feather of microstructure in 316L. This is due to the strong interstitial-substitutional Mo-N pairs and various stress strain conditions.