arXiv:2601.08970cond-mat.mtrl-scics.LG2026-01被引 1

用机器学习加速合金蠕变规律发现,一次实验测25种合金。

Machine Learning-Driven Creep Law Discovery Across Alloy Compositional Space

  • 用DABI装置并行测试25种合金,结合3D图像相关测量变形
  • 用RNN+粒子群优化反演,从稀疏数据中精准提取蠕变参数
  • 自动识别47种合金的主导蠕变模型,适配材料设计与优化

高温结构合金的蠕变性能传统上依赖逐个进行单轴拉伸试验,难以高效探索合金成分的大规模组合空间。本文提出一种基于凹坑阵列膨胀仪(DABI)配置的机器学习辅助高通量蠕变定律识别框架,可在一次实验中并行测试25个不同合金的凹坑。通过3D数字图像相关技术测量凹坑在惰性气体压力下随时间发生的全场表面位移。训练循环神经网络(RNN)作为代理模型,将蠕变参数与加载条件映射到DABI的时变形变响应。结合粒子群优化与稀疏正则化,可快速实现全局逆向识别。此外,提出具有时变应力指数的表观蠕变律,准确捕捉了加工态INCONEL 625的S型初蠕变,并提取其温度依赖性。进一步采用融合多种经典形式的通用蠕变律,结合正则化反演,成功识别出47种铁、镍、钴基合金的蠕变行为,并自动选择每种合金的主导函数形式。该工作构建了一个兼容数据挖掘、成分-性能建模与非线性结构优化的高通量定量蠕变表征平台。

原文摘要 · Abstract (English)

Hihg-temperature creep characterization of structural alloys traditionally relies on serial uniaxial tests, which are highly inefficient for exploring the large search space of alloy compositions and for material discovery. Here, we introduce a machine-learning-assisted, high-throughput framework for creep law identification based on a dimple array bulge instrument (DABI) configuration, which enables parallel creep testing of 25 dimples, each fabricated from a different alloy, in a single experiment. Full-field surface displacements of dimples undergoing time-dependent creep-induced bulging under inert gas pressure are measured by 3D digital image correlation. We train a recurrent neural network (RNN) as a surrogate model, mapping creep parameters and loading conditions to the time-dependent deformation response of DABI. Coupling this surrogate with a particle swarm optimization scheme enables rapid and global inverse identification with sparsity regularization of creep parameters from experiment displacement-time histories. In addition, we propose a phenomenological creep law with a time-dependent stress exponent that captures the sigmoidal primary creep observed in wrought INCONEL 625 and extracts its temperature dependence from DABI test at multiple temperatures. Furthermore, we employ a general creep law combining several conventional forms together with regularized inversion to identify the creep laws for 47 additional Fe-, Ni-, and Co-rich alloys and to automatically select the dominant functional form for each alloy. This workflow combined with DABI experiment provides a quantitative, high-throughput creep characterization platform that is compatible with data mining, composition-property modeling, and nonlinear structural optimization with creep behavior across a large alloy design space.

材料发现机器学习蠕变建模高通量实验

Thank you to arXiv for use of its open access interoperability. PaperDance 不是 arXiv 官方产品;中文卡片由大模型生成,请以原文为准。