High temperature sliding wear behaviors of ion plating TiN composite coating with ion nitriding interlayer on 3Cr2W8V hot work die steel substrate during 500～700 ℃ were investigated. Phase structure was analyzed by ...High temperature sliding wear behaviors of ion plating TiN composite coating with ion nitriding interlayer on 3Cr2W8V hot work die steel substrate during 500～700 ℃ were investigated. Phase structure was analyzed by XRD and adhesion strength of TiN coating was measured by scratch test. The worn morphologies and wear mechanism of TiN composite coating were observed and analyzed by using SEM. The results showed that both adhesion strength and hardness of TiN composite coating with ion nitriding interlayer are higher than those of single TiN coating. Ion nitriding interlayer provides a stronger support for TiN coating. With increasing temperature, the wear rates and friction coefficient of all tested coatings increase. The wear resistance of TiN composite coating is better than that of single TiN coating. The wear mechanisms of TiN composite coating are mainly adhesion transfer wear and abrasive wear. The adhesion transfer wear becomes more severe as the test temperature increases. [展开更多
THE year 1995 was very special for Cai Shuzhen. In addition to having net earnings of 400,000 yuan, Cai retired an outstanding loan and invested 780,000 yuan in farm machinery. Local villagers found these achievements...THE year 1995 was very special for Cai Shuzhen. In addition to having net earnings of 400,000 yuan, Cai retired an outstanding loan and invested 780,000 yuan in farm machinery. Local villagers found these achievements surprising, for Cai had over the past years become notorious for undertakings which failed despite展开更多
A novel approach to damage detection in composite structures using hyperspectral image index analysis algorithm with neural network modeling employing Weight Elimination Algorithm (WEA) is presented and discussed. The...A novel approach to damage detection in composite structures using hyperspectral image index analysis algorithm with neural network modeling employing Weight Elimination Algorithm (WEA) is presented and discussed. The matrix band based technique allows the monitoring and analysis of a component’s structure based on correlation between sequentially pulsed thermal images. The technique produces several matrices resulting from frame deviation and pixel redistribution calculations with ability for prediction. The obtained results proved the technique to be capable of identifying damaged components with ability to model various types of damage under different conditions.展开更多
文摘High temperature sliding wear behaviors of ion plating TiN composite coating with ion nitriding interlayer on 3Cr2W8V hot work die steel substrate during 500～700 ℃ were investigated. Phase structure was analyzed by XRD and adhesion strength of TiN coating was measured by scratch test. The worn morphologies and wear mechanism of TiN composite coating were observed and analyzed by using SEM. The results showed that both adhesion strength and hardness of TiN composite coating with ion nitriding interlayer are higher than those of single TiN coating. Ion nitriding interlayer provides a stronger support for TiN coating. With increasing temperature, the wear rates and friction coefficient of all tested coatings increase. The wear resistance of TiN composite coating is better than that of single TiN coating. The wear mechanisms of TiN composite coating are mainly adhesion transfer wear and abrasive wear. The adhesion transfer wear becomes more severe as the test temperature increases. [
文摘THE year 1995 was very special for Cai Shuzhen. In addition to having net earnings of 400,000 yuan, Cai retired an outstanding loan and invested 780,000 yuan in farm machinery. Local villagers found these achievements surprising, for Cai had over the past years become notorious for undertakings which failed despite
文摘A novel approach to damage detection in composite structures using hyperspectral image index analysis algorithm with neural network modeling employing Weight Elimination Algorithm (WEA) is presented and discussed. The matrix band based technique allows the monitoring and analysis of a component’s structure based on correlation between sequentially pulsed thermal images. The technique produces several matrices resulting from frame deviation and pixel redistribution calculations with ability for prediction. The obtained results proved the technique to be capable of identifying damaged components with ability to model various types of damage under different conditions.
