螺旋缝扫描三维x射线衍射显微镜

IF 1.3 Q3 INSTRUMENTS & INSTRUMENTATION
Yujiro Hayashi, D. Setoyama, Kunio Fukuda, Katsuharu Okuda, Naoki Katayama, H. Kimura
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引用次数: 0

摘要

近年来,利用带锥形缝的扫描三维x射线衍射(S3DXRD)显微镜,实现了对塑性变形低碳钢晶粒局部应力的无损评价。然而,由于对αFe优化后的锥形狭缝具有固定的Bragg角,因此适用的金属和合金只局限于单相,并且低估了评估应力。本文提出了适用于各种金属和合金的旋转螺旋缝的S3DXRD,并利用扫描布拉格角进行精确的应力评估。用50 kev x射线微束对低碳钢作为体心立方相(BCC)和纯Cu作为面心立方相(FCC)进行了验证实验。取向映射的结果是,BCC和FCC金属均观察到多边形晶粒形状和清晰的晶界。由此证明,旋转螺旋狭缝的S3DXRD可以应用于各种金属和合金、多相合金,并在x射线聚焦光学系统确定的能量范围内,使用具有较高光子能量的x射线微束进行精确的应力评估。原则上,这意味着如果有更高能量的x射线微束,S3DXRD将适用于更大、更厚的金属和合金样品,而不是目前的微型测试或线状样品。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Scanning Three-Dimensional X-ray Diffraction Microscopy with a Spiral Slit
Recently, nondestructive evaluation of the stresses localized in grains was achieved for plastically deformed low-carbon steel using scanning three-dimensional X-ray diffraction (S3DXRD) microscopy with a conical slit. However, applicable metals and alloys were restricted to a single phase and evaluated stress was underestimated due to the fixed Bragg angles of the conical slit optimized to αFe. We herein propose S3DXRD with a rotating spiral slit adaptable to various metals and alloys and accurate stress evaluation with sweeping Bragg angles. Validation experiments with a 50-keV X-ray microbeam were conducted for low-carbon steel as a body-centered cubic (BCC) phase and pure Cu as a face-centered cubic (FCC) phase. As a result of orientation mapping, polygonal grain shapes and clear grain boundaries were observed for both BCC and FCC metals. Thus, it was demonstrated that S3DXRD with a rotating spiral slit will be applicable to various metals and alloys, multiphase alloys, and accurate stress evaluation using a X-ray microbeam with a higher photon energy within an energy range determined by X-ray focusing optics. In principle, this implies that S3DXRD becomes applicable to larger and thicker metal and alloy samples instead of current miniature test or wire-shaped samples if a higher-energy X-ray microbeam is available.
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来源期刊
CiteScore
2.80
自引率
28.60%
发文量
27
审稿时长
11 weeks
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