Processing of Fine-Grained Stainless Steels for Improved Oxidation Resistance

9322621 Basu这个SGER补助金探索了一种加工方法（喷射成形）来制造抗氧化不锈钢合金。需要细晶粒尺寸，这是通过喷射成形和引入高稳定的氮化铝和硼化钛沉淀来阻止晶粒长大来实现的。由于能够形成薄的连续二氧化硅层，作为外部铬层和大块合金之间的扩散屏障，所生产的不锈钢有望具有优异的高温抗氧化性。这项研究可能会导致加工方法的发展，以生产含有较低浓度铬的更便宜、高抗氧化的不锈钢。＊＊＊

9322621 Basu This SGER grant explores a method of processing (spray forming) to create oxidation-resistant stainless steel alloys. A fine grain size is required, and this is accomplished by spray forming and introduction of highly-stable precipitates of aluminum nitride and titanium boride to resist grain growth. The stainless steel produced is expected to have superior high temperature oxidation resistance due to its ability to form thin continuous silica layers that act as diffusion barriers between the exterior chromia layer and the bulk alloy. %%% This research could lead to the development of processing methods to produce less expensive, highly oxidation-resistant stainless steels that contain lower concentrations of chromium. ***