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<p>Experimental material hardness studies became the basis to advance the procedure of their multistage quality control by the LM-hardness method from the structure damage level in the hardness assessment with scattering parameters. The Weibull homogeneity coefficient is taken as this parameter. The procedure includes a number of techniques that permit the proper choice of an optimum entity out of the competing materials in view of their functional performance. The incoming quality control for sheet metal products after the structure damage level by comparing the hardness scattering parameters determined in characteristic areas of the front surface, and their quality assessment in the case of general structure damage in the initial state, which is equally distributed over the entire front surface of the sheet in the initial state or acquired in operation, are presented. The technique of material quality assessment after the product manufacturing operations is discussed. The metal structure condition assessment is presented without losing its integrity to withstand operational thermomechanical loads and control of the material as-received without service life data. The sheet material quality is evaluated by the anisotropy of its mechanical characteristics. The material quality is assessed by the degradation resistance from the control of its current state via the difference between the hardness scattering parameters in the loaded and initial states. The quality of materials was controlled for their in-service reliability. For this, two identical material specimens gripped in sequence were tested in uniaxial tension until one was fractured. The material quality was determined after the critical damaging level under different stress conditions and the critical level of scattered damage accumulation. The product quality after metal heat treatment is evaluated. The material quality control for a structural element as-received is proposed based on the assessment (prediction) of its crack formation and propagation resistance without fracture toughness criteria.</p>

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Damage Level of the Material Structure as a Multistage Criterion of the Product Quality Control

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • M. R. Muzyka,
  • V. P. Shvets

摘要

Experimental material hardness studies became the basis to advance the procedure of their multistage quality control by the LM-hardness method from the structure damage level in the hardness assessment with scattering parameters. The Weibull homogeneity coefficient is taken as this parameter. The procedure includes a number of techniques that permit the proper choice of an optimum entity out of the competing materials in view of their functional performance. The incoming quality control for sheet metal products after the structure damage level by comparing the hardness scattering parameters determined in characteristic areas of the front surface, and their quality assessment in the case of general structure damage in the initial state, which is equally distributed over the entire front surface of the sheet in the initial state or acquired in operation, are presented. The technique of material quality assessment after the product manufacturing operations is discussed. The metal structure condition assessment is presented without losing its integrity to withstand operational thermomechanical loads and control of the material as-received without service life data. The sheet material quality is evaluated by the anisotropy of its mechanical characteristics. The material quality is assessed by the degradation resistance from the control of its current state via the difference between the hardness scattering parameters in the loaded and initial states. The quality of materials was controlled for their in-service reliability. For this, two identical material specimens gripped in sequence were tested in uniaxial tension until one was fractured. The material quality was determined after the critical damaging level under different stress conditions and the critical level of scattered damage accumulation. The product quality after metal heat treatment is evaluated. The material quality control for a structural element as-received is proposed based on the assessment (prediction) of its crack formation and propagation resistance without fracture toughness criteria.