Characterization and Comparison of Deformation Induced Sensitization and Carbide Precipitation: Waste/Container Corrosion

建议的研究计划旨在研究316不锈钢中界面碳化物析出和碳化物在颗粒基质中析出的基本原理。包括德克萨斯大学的工程师和少数族裔学生在内的研究人员将比较316不锈钢的几何和晶体特征与304不锈钢中的马氏体形核。他们的任务将是确定碳化物析出的特定界面位置是否也是马氏体形核所特有的，以及晶粒内的恒定应变交点(专用于304不锈钢中的阿尔法素-马氏体形核)是否是316不锈钢中的析出形核位置。对变形引起的敏化和沉淀机制形成基本了解的实际后果将在潜在的合金修改和在不锈钢容器或管道系统中储存和运输危险和腐蚀性废物所造成的潜在危险的模拟的背景下进行审查。

The proposed research program is designed to examine the fundamentals of both interfacial carbide precipitation and precipitation of carbides within a grain matrix in 316 stainless steel. Researcher, including engineers and minority students at the University of Texas, will compare the geometrical and crystallographic features of 316 stainless steel with martensite nucleation in 304 stainless steel. Their task will be to determine whether specific interfacial sites for precipitation of carbides are also specific for martensite nucleation, and whether invariant strain intersections within the grains (which are specific to alpha prime-martensite nucleation in 304 stainless steel) are precipitation nucleation sites in 316 stainless steel. Practical consequences of developing a fundamental understanding of the deformation-induced sensitization and precipitation mechanisms will be examined in the context of potential alloy modification and modeling of potential hazards imposed by storing and transporting hazardous and corrosive wastes in stainless steel containers or pipeline systems.