發(fā)布時間：2018-04-01 15:41

  本文選題：材料科學基礎科學　切入點：蠕變壽命預測　出處：《材料導報》2017年10期

【摘要】：通過對P91耐熱鋼在高溫長時蠕變過程中微觀組織演化行為的綜合考察,探討了影響其長時蠕變壽命的主要因素,其中包括強化相(M_(23)C_6、MX)與析出相(Laves、Z相)的粗化現(xiàn)象以及和位錯間的交互作用等。在此基礎上,通過對蠕變冪率本構(gòu)方程中耦合相應內(nèi)應力參量,并結(jié)合Monkman-Grant方程,從微觀組織演化的角度建立了P91耐熱鋼長時蠕變壽命預測模型。最后利用該模型對873K(600℃)時的P91耐熱鋼的相關蠕變壽命進行了預測,結(jié)果顯示其計算數(shù)值與實驗數(shù)據(jù)吻合較好,從而進一步表明基于微觀組織演化的預測模型在P91耐熱鋼長時蠕變壽命的研究中具有重要意義。
[Abstract]:Based on the comprehensive investigation of microstructure evolution behavior of P91 heat resistant steel during high temperature and long term creep, the main factors influencing its long term creep life are discussed. These include the coarsening phenomenon of M / M _ (23) C _ (6) M _ X) and the interaction between M _ 2O _ 2 and dislocation. On this basis, the corresponding internal stress parameters are coupled to the creep power rate constitutive equation, and the Monkman-Grant equation is combined. The prediction model of long term creep life of P91 heat resistant steel is established from the point of view of microstructure evolution. Finally, the related creep life of P91 heat resistant steel at 873K(600 鈩，

本文編號：1696179