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首页> 外文期刊>Quantum Beam Science >Phase Stress Measurement of Centrifugally Cast Duplex Stainless Steel by Neutron Diffraction
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Phase Stress Measurement of Centrifugally Cast Duplex Stainless Steel by Neutron Diffraction

机译：中子衍射离离心铸双相不锈钢的相应力测量

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摘要

Residual stress can be easily generated during material processing and affect the performance of structural components. Phase stress distribution in austenitic-ferritic duplex stainless steels (DSSs) is complicated due to the different material properties between the two phases. In this study, residual phase stress distribution along the thickness direction of centrifugally cast DSS hollow cylinder was measured by pulsed neutron diffraction with the time-of-flight (TOF) method. The triaxial phase stress distribution along the thickness direction shows that the phase stress of austenitic phase is generally in tension and higher than that of ferrite phase. From the outer surface to the inner surface, the macro-stress distributes from ?400 MPa to 200 MPa. The mechanism of macro-stress formation was deduced by taking into consideration the thermal shrinkage behavior during the cooling process of water quench after the solution heat treatment. Furthermore, the lattice strain and phase stress evolution under the uniaxial tensile loading was evaluated by in-situ neutron diffraction measurement. The results indicated that the magnitude of phase stress could be affected by plastic working as well. All these measurements were conducted at Japan Proton Accelerator Research Complex (J-PARC).
机译：在材料处理期间可以容易地产生残留应力并影响结构部件的性能。由于两相之间的不同材料性质，奥氏体 - 铁素体双链体不锈钢（DSSS）中的相应力分布复杂。在该研究中，通过与飞行时间（TOF）方法的脉冲中子衍射测量沿离心铸造DSS中空圆柱体的厚度方向的残余相位应力分布。沿厚度方向的三轴相位应力分布表明，奥氏体相的相应力通常在张力和高于铁氧体相的相位应力。从外表面到内表面，宏应力从？400MPa分配到200MPa。考虑到溶液热处理后水淬的冷却过程中的热收缩行为推导出宏观应力形成的机制。此外，通过原位中子衍射测量评价单轴拉伸载体下的晶格菌株和相位应力逸出。结果表明，相位应力的大小也可能受到塑料工作的影响。所有这些测量都在日本质子加速器研究复合体（J-PARC）进行。

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