We propose that high strain-hardening in face-centered cubic (FCC) crystals containing interstitial atoms could be achieved through the formation of nanoscale hexagonal close-packed (HCP) martensite with severe lattice distortions. Our experimental results showed that carbon atoms could more effectively prevent the HCP martensite from thickening and result in the formation of nano-HCP martensite. This caused a higher strain-hardening rate in FeMnSiC steel with heavy carbon than in FeMnSiCrNi steel with trace carbon though the HCP martensite transformation kinetics was almost the same in these two steels.

中文翻译：

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通过变形诱导纳米 HCP 马氏体在 Fe-Mn-Si-C 高锰钢中实现优异的应变硬化

我们提出，通过形成具有严重晶格畸变的纳米级六方密堆积 (HCP) 马氏体，可以实现含有间隙原子的面心立方 (FCC) 晶体的高应变硬化。我们的实验结果表明，碳原子可以更有效地阻止 HCP 马氏体增厚并导致纳米 HCP 马氏体的形成。这导致含有重碳的 FeMnSiC 钢比含有微量碳的 FeMnSiCrNi 钢具有更高的应变硬化速率，尽管这两种钢的 HCP 马氏体转变动力学几乎相同。