High-strength, high-plasticity and corrosion-resistant FeCrNiAlTi system medium-entropy alloy with tensile strength of 1600 MPa and preparation method

The invention relates to a high-strength, high-plasticity and corrosion-resistant FeCrNiAlTi system medium-entropy alloy with tensile strength of 1600 MPa and a preparation method. The high-strength, high-plasticity and corrosion-resistant FeCrNiAlTi system medium-entropy 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 53 < a < 62, 13 < = b < = 15, 20 < c < = 22, 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 has good corrosion resistance, the tensile strength is larger than or equal to 1600 MPa, the percentage elongation after fracture is larger than or equal to 10%, the preparation cost is reduced, and industrial production is facilitated. 本发明涉及抗拉强度1600MPa级高强高塑耐蚀FeCrNiAlTi系中熵合金及制备方法，按重量百分比计化学成分为：Fe a％；Cr b％；