增材制造Ti合金数字散斑相关方法应变检测及成形极限构建综述

增材制造Ti合金的制件性能能否优于传统铸件、锻件的性能是研究人员关注的重点,亟需开展系统化的检测与评价方法研究.主要综述了增材制造Ti合金构件材料应变检测及相关成形性能基础理论研究中存在的不足和国内外研究现状,结合笔者的研究经历,围绕增材制造现阶段的研究热点,数字散斑相关方法(Digital Speckle Corre...

Strain Detection and Forming Limit Construction of Digital Speckle Correlation Method for Ti Alloy by Additive Manufacturing

Whether the properties of Ti alloy by additive manufacturing is better than that of traditional castings and forgings is the focus of researchers'' attention, and there is an urgent need to carry out systematic detection and evaluation methods. The shortcomings in the basic theoretical research on material strain detection and related formability of Ti alloy components by additive manufacturing and the research status at home and abroad were mainly summarized. Combined with the research experience, the research hotspot of additive manufacturing at the present stage and the digital speckle strain accuracy detection were generalized. Then, the feasibility of applying digital speckle correlation method to additive manufacturing strain detection was reviewed, and the key scientific problems and solutions of DSCM method in constructing detection and evaluation system were put forward. The experimental scheme of DSCM strain detection and forming limit visualization in additive manufacturing was discussed, which was divided into digital speckle measurement system, method and theory of strain measurement, realization mechanism of strain compare and forming limit visualization. Finally, the research progress in this direction was concluded, and the development prospect and main development direction were prospected.