冷却速率越大或预变形处理以后的试样在熔化过程中更容易发生二次枝晶臂之间的合并。
The more the increase of cooling rate or pre-deformation, the more the secondary dendrite arms are easy to coarsen.
对含有内部裂纹的45钢试样采取了不同温度一次加热正火处理和二次加热正火处理，研究了其内部裂纹愈合的可能性。
The possibility of inner microcrack healing was studied by normalizing the 45 steel samples containing inner crack for one time and two times respectively.
结果表明：在焊缝区域内存在着局部未熔区以及铸造疏松组织和二次裂纹等缺陷，这是导致试样低应力断裂的根本原因。
The results show that the partial unmelted region, casting defect structure and secondary crack form in the welding seam, which result in the low stress breakage of the samples.
通过二次熔炼处理，可在一定程度上改善试样的微观组织结结构，提高其力学性能。
Through secondary smelting processing, to a certain extent, the microstructure of the samples and its mechanical properties improve.
讨论了为获得放射虫化石的高质量的二次电子图像所采用的试样制备方法。
In this paper the sample preparation techniques of radiolarite were discussed in order to get high quality secondary electron images in SEM.
在环境分析中，SFE能够减少试样用量、缩短试样处理时间，且无二次污染。
Applying SFE in the analysis of environment can make reduction of sample dosage, shortening the sample treatment period and no second pollution.
经C路径的二次ECAE加工后试样为各向同性材料，其缺口冲击强度较PP有所提高，拉伸强度下降，断裂伸长率提高，表现出很好的延伸性。
The specimen by route C ECAE processing was isotropic and its impact strength increased, tensile strength decreased, elongation at break improved and show…
经C路径的二次ECAE加工后试样为各向同性材料，其缺口冲击强度较PP有所提高，拉伸强度下降，断裂伸长率提高，表现出很好的延伸性。
The specimen by route C ECAE processing was isotropic and its impact strength increased, tensile strength decreased, elongation at break improved and show…
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