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Creep property evaluation of a 2.25Cr-1Mo low alloy steel

机译：2.25Cr-1Mo低合金钢的蠕变性能评估

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摘要

The creep properties of a 2.25Cr-1Mo steel which was quenched from 1253 K and tempered at 923 K were examined under different engineering stresses (225-325 Mpa) at temperatures ranging from 773 to 898 K. The creep behavior followed the temperature-compensated power law and Monkman-Grant equations. In the temperature-compensated power law equation, the apparent activation energy and stress exponent for creep were determined as approximately 380 kJ/mol and 10, respectively. In the Monkman-Grant relation, the values of m and C were determined as around 1.016 and 0.0528, respectively, when the minimum creep rate was in h~(-1) and the rupture time in h. In all conditions considered the specimens all presented ductile fracture with a rupture strain over 29%. There existed a minimum value of rupture strain at 250 Mpa as the rupture strain varies with applied stress from 225 to 325 Mpa when testing at 823 K, which could be caused by recrystallization in the fracture tip areas of the material.
机译：在不同的工程应力（225-325 Mpa）下，在773至898 K的温度下，测试了从1253 K淬火并在923 K回火的2.25Cr-1Mo钢的蠕变性能。蠕变行为遵循温度补偿幂律和Monkman-Grant方程。在温度补偿的幂律方程中，蠕变的表观活化能和应力指数分别确定为约380 kJ / mol和10。在蒙克曼-格兰特关系中，当最小蠕变速率为h〜（-1），破裂时间为h时，m和C的值分别确定为1.016和0.0528。在所有考虑的条件下，所有标本都呈现出韧性断裂，断裂应变超过29％。在823 K下测试时，由于应变随施加的应力从225 Mpa变化到325 Mpa，因此存在250 Mpa的断裂应变最小值，这可能是由于材料的断裂尖端区域中的再结晶引起的。

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  • 来源
    《Materials Science and Engineering》 |2010年第9期|2398-2403|共6页
  • 作者

    S.-H. Song; J. Wu; X.-J. Wei; D. Kumar; S.-J. Liu; L.-Q. Weng;

  • 作者单位

    Shenzhen Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Xili, Shenzhen 518055, China;

    Shenzhen Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Xili, Shenzhen 518055, China;

    Shenzhen Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Xili, Shenzhen 518055, China;

    Shenzhen Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Xili, Shenzhen 518055, China;

    Shenzhen Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Xili, Shenzhen 518055, China;

    Shenzhen Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Xili, Shenzhen 518055, China;

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  • 正文语种 eng
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  • 关键词

    creep testing; creep properties; Cr-Mo low alloy steels;

    机译：蠕变测试;蠕变性能;铬钼低合金钢;

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