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在材料研究中“原位”测试技术占有非常重要的地位,它能将材料的组织形貌、化学成分和晶体结构等微结构与材料的性能和加工过程等一一地对应起来,从而获得更加真实反映材料组织与性能之间关系的试验结果。然而“原位”测试大多需要特殊并且昂贵的试验装置与设备,如电镜中配置的加热与拉伸样品台、环境扫描电镜等。实际上许多研究过程还很难进行“原位”观察。经过多年大量的实践,提出一种基于扫描电镜新的“原位跟踪”观察和测量技术。与传统的“原位”分析不同,在“原位跟踪”观测过程中,材料样品的处理过程是在扫描电镜外进行的。利用该技术研究了焊接熔合区的腐蚀和碳迁移过程,以及不锈钢材料在高温下的回复与再结晶。试验表明采用“原位跟踪”技术可获得与“原位”观测相同的效果。
In materials research, “in-situ” testing technology plays a very important role in the microstructure of materials such as microstructure, chemical composition and crystal structure, and material properties and processing processes, etc., so that Get more realistic test results that reflect the relationship between material organization and performance. However, “in situ” testing requires mostly special and expensive test equipment and equipment such as heated and stretched sample stages configured for electron microscopy, environmental scanning electron microscopy, and the like. In fact, many research processes are still very difficult to do “in situ ” observation. After many years of practice, a new “in-situ tracking” observation and measurement technique based on SEM has been proposed. Unlike traditional “in situ” analysis, material samples are processed outside of the SEM during the “in-situ tracking” observation. Using this technique, the corrosion and carbon migration of weld zone and the recovery and recrystallization of stainless steel at high temperature were studied. Experiments have shown that using the “in-situ tracking” technique yields the same effect as the “in situ” observation.