Laser multiple processing, i.e. laser surface texturing and then Laser Shock Processing (LSP), is a new surface processing technology for the preparation of bionic non-smooth surfaces. Based on engineering bionics, sa...Laser multiple processing, i.e. laser surface texturing and then Laser Shock Processing (LSP), is a new surface processing technology for the preparation of bionic non-smooth surfaces. Based on engineering bionics, samples of bionic non-smooth surfaces of stainless steel 0Crl 8Ni9 were manufactured in the form of reseau structure by laser multiple processing. The mechanical properties (including microhardness, residual stress, surface roughness) and microstructure of the samples treated by laser multiple processing were compared with those of the samples without LSP The results show that the mechanical properties of these samples by laser multiple processing were clearly improved in comparison with those of the samples without LSP The mechanisms underlying the improved surface microhardness and surface residual stress were analyzed, and the relations between hardness, comnressive residual stress and roughness were also presented.展开更多
研究了0Cr18Ni9不锈钢材料常温和77 K下的断裂性能,利用光学显微镜、电子扫描显微镜(SEM)进行断口分析。结合断口学结果,分析了温度对0Cr18Ni9不锈钢材料断裂行为的影响,结果表明0Cr18Ni9不锈钢材料稳定裂纹扩展开始时的断裂韧度工程估...研究了0Cr18Ni9不锈钢材料常温和77 K下的断裂性能,利用光学显微镜、电子扫描显微镜(SEM)进行断口分析。结合断口学结果,分析了温度对0Cr18Ni9不锈钢材料断裂行为的影响,结果表明0Cr18Ni9不锈钢材料稳定裂纹扩展开始时的断裂韧度工程估计值JQ在常温和77 K下分别为2 116.1 k J/m2、160.0 k J/m2,实际的起裂韧度值Ji在常温和77 K下分别为325.3 k J/m2、43.1k J/m2。展开更多
基金supported by the National Natural Science Foundation of China (Grant No.50705038,50735001 and 10804037)the Foundation of Jiangsu Province (Grant No.06-D-023,BK2007512 and BG2007033)+2 种基金The 8th Student Research Train Program of Jiangsu University (Grant No.08A172)the Innovation Program of Graduated Student of Jiangsu Province (Grant No.XM2006-45)the Open Foundation of Jiangsu Key Laboratory of Advanced Numerical Control Technology (Grant No.KXJ07126)
文摘Laser multiple processing, i.e. laser surface texturing and then Laser Shock Processing (LSP), is a new surface processing technology for the preparation of bionic non-smooth surfaces. Based on engineering bionics, samples of bionic non-smooth surfaces of stainless steel 0Crl 8Ni9 were manufactured in the form of reseau structure by laser multiple processing. The mechanical properties (including microhardness, residual stress, surface roughness) and microstructure of the samples treated by laser multiple processing were compared with those of the samples without LSP The results show that the mechanical properties of these samples by laser multiple processing were clearly improved in comparison with those of the samples without LSP The mechanisms underlying the improved surface microhardness and surface residual stress were analyzed, and the relations between hardness, comnressive residual stress and roughness were also presented.
文摘研究了0Cr18Ni9不锈钢材料常温和77 K下的断裂性能,利用光学显微镜、电子扫描显微镜(SEM)进行断口分析。结合断口学结果,分析了温度对0Cr18Ni9不锈钢材料断裂行为的影响,结果表明0Cr18Ni9不锈钢材料稳定裂纹扩展开始时的断裂韧度工程估计值JQ在常温和77 K下分别为2 116.1 k J/m2、160.0 k J/m2,实际的起裂韧度值Ji在常温和77 K下分别为325.3 k J/m2、43.1k J/m2。
