High-strength, high-plasticity and corrosion-resistant FeCrNiAlTi system medium-entropy alloy with tensile strength of 1,500 MPa and preparation method thereof

The invention relates to a high-strength, high-plasticity and corrosion-resistant FeCrNiAlTi system medium-entropy alloy with tensile strength of 1500MPa and a preparation method of the alloy. The alloy comprises the following chemical components in percentage by weight: a% of Fe; b% of Cr; c% of Ni; d% of Al; e% of Ti; f% of Mo; g% of Cu; p < i% >; s < j% >; wherein 58 < a < 66, 11 < = b < 13, 18 < = c < = 20, 2 < = d < = 3, 2 < = e < = 3, 1 < = f < = 2, 0 < = g < = 1, i < = 0.001, j < = 0.001, and a + b + c + d + e + f + g + i + j = 100; the mixed entropy is 1R to 1.5 R, and R is equal to 8.314 J/(mol * K). The medium-entropy alloy prepared through the method has good corrosion resistance, the tensile strength is larger than or equal to 1500 MPa, the percentage elongation after fracture is larger than or equal to 12%, cost is reduced, and industrial production is facilitated. 本发明涉及抗拉强度1500MPa级高强高塑耐蚀FeCrNiAlTi系中熵合金及其制备方法，按重量百分比计化学成分为：Fe a％；Cr b％；Ni c％；Al d％；Ti e％；Mo f％；Cu g％；P i％；S j％；其中，58＜a＜66，11≤b＜13，18≤c