Combined with the structure features at the relieve grooves of RD3A1 axles,the mechanism of crack generation at the relieve grooves on axle journals is expounde.

• 结合RD3A1车轴卸荷槽部位的结构特点,阐述了车轴轴颈卸荷槽部位裂纹产生的机理,为制定有效的预防措施提供了可靠的依据。