Corrosion Resistance and Hardness Enhancements in Ti1300 Alloy by Regulating Undercooling and Cooling Rate

The rapid solidification and thermophysical properties of liquid Ti1300 alloy were achieved using electromagnetic levitation (EML) and electromagnetic levitation coupled with liquid quench (EML‐LQ). The temperature increased from 1875 to 2050 K, and the surface tension decreased from 1.744 to 1.256 N m −1 . The specific heat of the liquid alloy was 41.27 ± 3.75 J mol −1 K −1 . The Ti1300 alloy consisted of the (βTi) phase. The electromagnetically levitated alloy with undercooling of 120 K not only achieved grain refinement but also had similar orientations between adjacent grains with uniform elements distribution. This increased the hardness by 15% and maintained good resistance to grain boundary corrosion in the wide potential range of about 2 V SCE compared with the master alloy. The size of the (βTi) grain in the alloy processed by EML‐LQ was further refined to 150 μm under coupled effect of high undercooling and large cooling rate, the increase in geometrically necessary dislocation hindered the deformation inside the grain, and the hardness was up to 330 HV.