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首页> 外文期刊>Materials Science and Engineering >Use of instrumented micro-indentation to study the mesoscopic elasto-plastic behavior of GH4145/SQsuperalloy during high-temperature cyclic straining
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Use of instrumented micro-indentation to study the mesoscopic elasto-plastic behavior of GH4145/SQsuperalloy during high-temperature cyclic straining

机译：使用仪器的微压痕研究GH4145 / SQ高温循环拉伸过程中介观的弹塑性行为

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In this paper the instrumented micro-indentation testing (IFF) was used to study the mesoscopic elasto-plastic behavior of nickel-base superalloy GH4145/SQsubjected to cyclic straining at an elevated-temperature. For this purpose, a series of experiments including high-temperature low-cycle fatigue tests, instrumented micro-indentation measurements and OM (TEM) examinations were carried out. The characteristic parameters of indentation (C, h_max-S, h_r, W_e and W_P) during high-temperature fatigue failure process were determined from the experimental indentation load-depth {P-h) curves. The fatigue mesoscopic elasto-plastic properties such as E, σ_y and n were estimated using Dao et al.'s analysis algorithm [19], combined with the indentation characteristic parameters, and their distribution patterns were verified in a statistical sense. Microstructural examinations using both OM and TEM were performed to provide the micromechanisms for the fatigue mesoscopic elasto-plastic behavior of the superalloy during high-temperature low-cycle fatigue.
机译：本文使用仪器化的微压痕测试（IFF）来研究镍基高温合金GH4145 / SQ在高温下承受循环应变的介观弹塑性行为。为此，进行了一系列实验，包括高温低循环疲劳测试，仪器化的微压痕测量和OM（TEM）检查。根据实验压痕载荷深度（P-h）曲线确定高温疲劳破坏过程中压痕的特征参数（C，h_max-S，h_r，W_e和W_P）。使用Dao等人的分析算法[19]估算了疲劳介观的弹塑性，例如E，σ_y和n，并结合压痕特征参数进行了统计检验。进行了使用OM和TEM的显微组织检查，以提供高温低周疲劳过程中高温合金的疲劳介观弹塑性行为的微观机制。

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