首页> 外文期刊>Metals and Materials International >Modeling and Characterization of As-Welded Microstructure of Solid Solution Strengthened Ni-Cr-Fe Alloys Resistant to Ductility-Dip Cracking Part II: Microstructure characterization
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Modeling and Characterization of As-Welded Microstructure of Solid Solution Strengthened Ni-Cr-Fe Alloys Resistant to Ductility-Dip Cracking Part II: Microstructure characterization

机译:抗延性-浸裂的固溶强化Ni-Cr-Fe合金铸态组织的建模与表征第二部分:组织表征

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摘要

In part II of this work is evaluated the as-welded microstruclurc of Ni-Cr-Fe alloys, which were selected and modeled in part I. Detailed characterization of primary and secondary precipitates, subgrain and grain structures, partitioning, and grain boundary morphology were developed. Microslructural characterization was carried out using optical microscopy, SEM, TEM, EBSD, and XEDS techniques. These results were analyzed and compared to modeling results displaying a good agreement. The Hf additions produced the highest waviness of grain boundaries, which were related to distribution of Hi-rich carbonitrides. Experimental evidences about Mo distribution into crystal lattice have provided information about its possible role in ductility-dip cracking (DDC). Characterization results of studied alloys were analyzed and linked to their DDC resistance data aiming to establish relationships between as-welded microstructure and hot deformation performance. Wavy grain boundaries, primary carbides distribution, and strengthened crystal lattice are metallurgical characteristics related to high DDC resistance.
机译:在这项工作的第二部分中,对Ni-Cr-Fe合金的焊接微结构进行了评估,并在第一部分中对其进行了建模和建模。对初生和次生沉淀物,亚晶粒和晶粒结构,分配和晶界形态进行了详细的表征。发达。使用光学显微镜,SEM,TEM,EBSD和XEDS技术进行微结构表征。分析了这些结果,并与显示出良好一致性的建模结果进行了比较。 f的添加使晶界的波纹度最高,这与高碳氮化物的分布有关。关于Mo分布到晶格中的实验证据提供了有关Mo在延性-浸润裂纹(DDC)中可能作用的信息。分析研究合金的表征结果,并将其与DDC电阻数据联系起来,以建立焊接后的微观结构与热变形性能之间的关系。波浪状晶界,原始碳化物分布和强化的晶格是与高DDC电阻相关的冶金特性。

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