一种针对激光选区熔化合金的纳米压痕力学性能检测方法
By using a non-uniform indentation array and a modified constitutive model, combined with nanoindentation testing and numerical inversion algorithms, the problems of microstructure adaptability and anisotropy in the micro-area performance testing of laser selective melting alloys were solved, achieving high-precision micro-area mechanical property evaluation and macroscopic equivalent property mapping.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHENGDU TECH UNIV
- Filing Date
- 2026-04-16
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies for characterizing the micro-region properties of laser selective melting alloys suffer from poor microstructure adaptability, low constitutive extraction accuracy, and inability to reflect anisotropic differences. Furthermore, traditional detection methods cannot capture microstructure inhomogeneity.
By acquiring the microstructure and morphology characteristics of laser selective melting alloys, a non-uniform indentation array is planned. Combining nanoindentation testing and numerical inversion algorithms, a modified constitutive model is established. Fine grain strengthening and dislocation density contribution terms are introduced to extract micro-region mechanical parameters and perform anisotropic weighting to achieve macroscopic equivalent performance evaluation.
It accurately covers the performance gradient of the molten pool boundary and heat-affected zone, improves the accuracy of micro-area mechanical property testing, provides quantitative process parameter feedback, ensures the objectivity and repeatability of test results, and can accurately characterize the anisotropic mechanical behavior of SLM alloys.
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Figure CN122042439B_ABST