Abstract

The effect of repetitive high-stress loading (RHSL) at ultralow temperature on the microstructure and mechanical properties of S04 martensitic steel was studied. RHSL significantly increases the yield strength of S04 steel from 1220 to 1650 MPa and raises the tension elastic modulus from 170 to 207.5 GPa with small plastic deformation. This most efficient strengthening mechanism involves the evolution of dislocation patterns and the formation of martensite twins.

中文翻译：

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超低温下反复高应力加载对马氏体不锈钢的显着强化作用

抽象的

研究了超低温下的重复高应力载荷（RHSL）对SO 4马氏体钢组织和力学性能的影响。RHSL将S04钢的屈服强度从1220 MPa提高到1650 MPa，并将拉伸弹性模量从170 GPa增加到207.5 GPa，且塑性变形较小。这种最有效的强化机制涉及位错模式的演变和马氏体孪晶的形成。