The goal of this study was to acquire mechanical properties of a dual-phase grade advanced high strength steel (AHSS) by means of different microindentation loading conditions. Conventional, cyclic, and multi-step indentations were performed on DP 800 sample; and Young’s modulus, hardness values were obtained by the depth-sensing indentation technique. Effects of different load levels (50–300 mN) and type of indentation on the results were also analyzed through ANOVA. The load levels experimented yielded overall material response rather than its constituents (e.g., martensite and ferrite). Both hardness and Young’s modulus tend to decrease with increasing maximum indentation load level, especially from 50 to 100 mN, which is regarded as indentation size effect.

中文翻译：

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压痕加载方式对高级高强度钢级DP 800力学性能的影响

本研究的目的是通过不同的微压痕加载条件获得双相级高级高强度钢 (AHSS) 的机械性能。对 DP 800 样品进行了常规、循环和多步压痕；和杨氏模量，硬度值是通过深度感应压痕技术获得的。还通过方差分析分析了不同负载水平 (50–300 mN) 和压痕类型对结果的影响。试验的负载水平产生了整体材料响应，而不是其成分（例如，马氏体和铁素体）。硬度和杨氏模量都随着最大压痕载荷水平的增加而降低，特别是从 50 到 100 mN，这被认为是压痕尺寸效应。