| Strengthening of an AISI 1020 Steel by Aluminum-Microalloying During Liquid Dynamic Compaction. (1998) | |||||||||
Abstract | |||||||||
| Liquid dynamic compaction (LDC), a rapid solidification spray deposition process, produced grain size refinement in an AISI 1020 steel alloyed with 0.06 wt% Al; the spray deposit showed a fine (10-40 microns), equiaxed ferrite plus pearlite structure and a high as-deposited density of about 95% of theoretical; minor reductions up to 70% in hot rolling plus annealing, both at low austenitic temperatures (850-900 C), fully densified the deposit and resulted in significantly finer (3-4 microns) ferritic grains with uniformly distributed fine pearlite colonies; room temperature yield and ultimate tensile strength values exceeding 80 and 90 ksi (550 and 620 MPa), respectively, were obtained at high ductility levels; the fine microstructures were stabilized by AlN precipitates even on reheating to temperatures up to 1100 C. | |||||||||
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