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首页> 外文期刊>Journal of Materials Engineering and Performance >Nano-Deformation Behavior of a Thermally Aged Duplex Stainless Steel Investigated by Nanoindentation, FIB and TEM
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Nano-Deformation Behavior of a Thermally Aged Duplex Stainless Steel Investigated by Nanoindentation, FIB and TEM

机译：纳米茚，FIB和TEM研究热老化双相不锈钢的纳米变形行为

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摘要

Nanoindentation and electron backscattering diffraction were conducted on a thermally aged duplex stainless steel to investigate the?effect of crystal orientation on the plastic deformation behavior during indentation testing. Both nanohardness H and indentation modulus E are correlated with the orientation factor averaged over three normal directions of the contact surface. After thermal aging, the orientation dependence of?the?hardness and indentation modulus in ferrite significantly changed. For both the ferrite and austenite phases, the maximum and minimum values of the?hardness and indentation modulus are given by the?near- $$leftlangle {111} ightangle$$ 111 ?and near- $$leftlangle {001} ightangle$$ 001 -oriented grains, respectively. The TEM analysis results indicate that the area of plastic deformation in the ferrite grain decreases after thermal aging. The interactions between precipitates and dislocations are considered to be responsible for the degradation of plastic deformation ability in ferrite. The anisotropy of hardness is related to the crystallographic nature and shearing mechanisms.
机译：在热老化的双相不锈钢上进行纳米intentation和电子反向散射衍射，研究晶体取向对压痕试验期间塑性变形行为的影响。纳米纳米和压痕模量E都与在接触表面的三个正常方向上平均的方向因子相关。热老化后，定向依赖性依赖性依赖性铁氧体中的硬度和压痕模量显着变化。对于铁素体和奥氏体相，近乎左 lex langle {111} rect- rangle $$ 111给出的最大和最小值和缩进模量的最大值和最小值左 langle {001} 右 rangle分别为$$ 001-oriented谷物。 TEM分析结果表明，热老化后铁氧体晶粒中的塑性变形面积降低。沉淀物和脱位之间的相互作用被认为是负责铁氧体中塑性变形能力的劣化。硬度的各向异性与结晶性质和剪切机构有关。

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