Mssbauer spectrum and three dimensional atom probes（3DAP） were combined to investigate the mechanism of cementite dissolution in a cold-drawn eutectoid steel at a true strain of 2.89.The experimental results suggest...Mssbauer spectrum and three dimensional atom probes（3DAP） were combined to investigate the mechanism of cementite dissolution in a cold-drawn eutectoid steel at a true strain of 2.89.The experimental results suggest that the dislocations play an important role in the dissolution of the cementite by sweeping across the nano-scaled cementite,and transferring carbon from cementite to ferrite inducing cementite decomposition.The mechanism of cementite dissolution in the steel is discussed in association with the investigation of nonstoichiometric cementite structure after heavy deformation.展开更多
This article considers collectively some of the most recent advances in the application of microscopicaland microanalytical techniques in materials science. including studies concerning rare metals. These comprise the...This article considers collectively some of the most recent advances in the application of microscopicaland microanalytical techniques in materials science. including studies concerning rare metals. These comprise the highest resolution obtained with electron microscopy. observation of moire patterns in transmisionelectron microscopy (TEM), electro-dimpling before ion beam thinning as an effective step in the preparation of TEM samples, hydrogen problem in atom probe analysis, and a novel analysis technique-lasermicroprobe mass spectrometry (LAMMS).展开更多
基金supported by the National Natural Science Foundation of China(No.50371057)
文摘Mssbauer spectrum and three dimensional atom probes（3DAP） were combined to investigate the mechanism of cementite dissolution in a cold-drawn eutectoid steel at a true strain of 2.89.The experimental results suggest that the dislocations play an important role in the dissolution of the cementite by sweeping across the nano-scaled cementite,and transferring carbon from cementite to ferrite inducing cementite decomposition.The mechanism of cementite dissolution in the steel is discussed in association with the investigation of nonstoichiometric cementite structure after heavy deformation.
文摘This article considers collectively some of the most recent advances in the application of microscopicaland microanalytical techniques in materials science. including studies concerning rare metals. These comprise the highest resolution obtained with electron microscopy. observation of moire patterns in transmisionelectron microscopy (TEM), electro-dimpling before ion beam thinning as an effective step in the preparation of TEM samples, hydrogen problem in atom probe analysis, and a novel analysis technique-lasermicroprobe mass spectrometry (LAMMS).
