The Stress-Strain Microprobe® (SSM) system and its Automated Ball Indentation® (ABI®) test technique were applied in the present study for the purpose of determining the flow properties of the alloy under study in a non-destructive manner. ABI tests were applied at 21 °C to the consolidated nanocrystalline Al-10 wt% Cu-5 wt% Ti alloy samples which were subjected to three and six hours of milling. The samples processed for six hours of milling were further tested at elevated temperatures of 200 °C and 400 °C. The results of the ABI tests of the alloy under study include the indentation load versus depth of penetration curves, true stress versus true-plastic-strain curves, determination of yield strength curves, ultimate tensile strength values, and ABI Brinell hardness number (BHN). X-Ray Diffraction (XRD) was applied to investigate the microstructure of the Al-10 wt% Cu-5 wt% Ti alloy subjected to different milling time before and after consolidation. XRD analysis includes identification of the main phases/elements present and calculating the crystallite size in the processed alloy for 3 and 6 h of milling before and after consolidation. Apreo Field Emission Scanning Electron Microscope was applied to characterize the size and morphology of the indentation area after conducting the ABI tests. In addition, the same technique was applied to reveal the elemental distribution in the indentation area of the tested samples.

应力应变Microprobe®（SSM）系统及其Automated BallIndentation®（ABI®）测试技术被应用在本研究中，目的是以无损方式确定所研究合金的流动性能。将ABI测试在21°C下对固结的纳米晶体Al-10 wt％Cu-5 wt％Ti合金样品进行了三个和六个小时的研磨。经过六个小时的研磨处理后的样品在200°C和400°C的高温下进行了进一步测试。所研究合金的ABI测试结果包括压入载荷与穿透深度曲线，真实应力与真实塑性应变曲线，屈服强度曲线的确定，极限抗拉强度值以及ABI布氏硬度值（BHN） 。利用X射线衍射（XRD）研究了固溶前后不同研磨时间的Al-10wt％Cu-5wt％Ti合金的显微组织。XRD分析包括识别固溶前后3到6个小时的加工后合金中存在的主要相/元素并计算微晶尺寸。在进行ABI测试后，使用Apreo场发射扫描电子显微镜表征压痕区域的大小和形态。此外，采用了相同的技术来揭示被测样品压痕区的元素分布。XRD分析包括识别固溶前后3到6个小时的加工后合金中存在的主要相/元素并计算微晶尺寸。在进行ABI测试后，使用Apreo场发射扫描电子显微镜表征压痕区域的大小和形态。此外，采用了相同的技术来揭示被测样品压痕区的元素分布。XRD分析包括识别固溶前后3到6个小时的加工后合金中存在的主要相/元素并计算微晶尺寸。在进行ABI测试后，使用Apreo场发射扫描电子显微镜表征压痕区域的大小和形态。此外，采用了相同的技术来揭示被测样品压痕区的元素分布。