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首页> 外文期刊>Materials at High Temperatures >Creep behaviour of AISI 316H stainless steel under stress-varying creep loading conditions: primary creep regeneration
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Creep behaviour of AISI 316H stainless steel under stress-varying creep loading conditions: primary creep regeneration

机译：AISI 316H不锈钢的蠕变行为在压力变化的蠕变加载条件下：初级蠕变再生

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摘要

Primary creep regeneration (PCR) is an important reported observation from creep under stress-varying conditions for several alloys. For a specimen deforming in the secondary creep regime, a stress reversal leads to an enhanced creep rate upon reloading due to reactivation of the primary creep regime (i.e. PCR). This paper focuses on an investigation of the PCR phenomenon during stress-varying creep loading for AISI 316H stainless steel at 650 degrees C. The experimental observations clarify the influence of different parameters (e.g. forward creep stress level, reverse stress magnitude and forward and reverse accumulated inelastic strain) on the extent of PCR activation. In addition, a correlation between the extent of PCR activation and inelastic strain accumulation during the reverse loading period was found, which was employed to develop an empirical-phenomenological model for prediction of the creep behaviour of the alloy after stress transients (e.g. stress reversals).
机译：初级蠕变再生（PCR）是在几种合金的应力变化条件下从蠕变的重要报告的观察。 对于在二次蠕变状态下变形的标本，应力反转导致在重新加载原发性蠕变状态（即PCR）的情况下重新加载时引起增强的蠕变速率。 本文侧重于在650摄氏度下对AISI 316H不锈钢的应力变化蠕变载荷期间PCR现象的研究。实验观察阐明了不同参数的影响（例如前向蠕变应力水平，反向应力幅度和向前和反向累积 非弹性应变）在PCR活化程度上。 此外，发现了在逆向负载期间的PCR活化和无弹性应变积聚之间的相关性，其用于开发用于预测应力瞬变（例如应力逆转）后合金的蠕变行为的经验现象学模型（例如应力逆转） 。

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