The behavior of as-received and cold-rolled Fe–25Mn–10Ni–0.65C twinning-induced plasticity steel in hydrogen environment was investigated using fatigue crack growth rate tests. The results show that TWIP steel shows weak hydrogen embrittlement susceptibility, which is due to the formation of deformation twins at the crack tip without strain-induced martensite. Hydrogen can promote the formation of deformation twins and may accumulate in the twin beam, which causes fatigue cracks in TWIP steel to propagate along the twin and slip bands in hydrogen environment. Cold rolling can substantially improve the hydrogen embrittlement resistance and fatigue resistance of TWIP steel.

使用疲劳裂纹扩展速率试验研究了原样和冷轧 Fe-25Mn-10Ni-0.65C 孪晶诱导塑性钢在氢环境中的行为。结果表明，TWIP钢表现出较弱的氢脆敏感性，这是由于在裂纹尖端形成了变形孪晶而没有应变诱发马氏体。氢能促进变形孪晶的形成，并可能在孪晶梁中积聚，导致 TWIP 钢的疲劳裂纹在氢环境中沿孪晶和滑移带传播。冷轧可大幅度提高TWIP钢的抗氢脆性和抗疲劳性。