Influence of Nb content on the stacking fault energy and mechanical properties of Fe-22Mn-0.4C alloy
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摘要: 研究了微合金元素Nb對Fe-22Mn-0.4C合金層錯能和力學性能的影響,利用X射線峰位移法測量計算了不同Nb含量的Fe-22Mn-0.4C合金的層錯幾率變化.結果表明隨著Nb含量的提高,合金的層錯幾率降低,層錯能提高.同時,Fe-22Mn-0.4C合金在拉伸變形過程中,變形機制由以TRIP效應為主導機制變為以TWIP效應為主導機制.不同的變形機制使不同Nb含量合金的力學性能發生變化,并使變形后的層錯幾率出現不同的變化量.
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關鍵詞:
- Nb /
- 層錯幾率 /
- Fe-22Mn-0.4C合金 /
- 力學性能 /
- 變形機制
Abstract: The influences of microalloy element niobium (Nb) on the stacking fault energy and mechanical properties of Fe-22Mn-0.4C alloy were analyzed. The stacking fault probability of Fe-22Mn-0.4C alloys with different Nb contents was determined by X-ray diffraction (XRD) profile analysis. The result shows that, with the increase of the Nb content, stacking fault probability decreases and the stacking fault energy of the alloy increases. During tensile deformation, the dominated deformation mechanism turns from transformation induced plasticity (TRIP) gradually into twinning induced plasticity (TWIP). Different deformation mechanisms play roles in the alloys with different Nb contents, which lead to changes in mechanical properties and stacking fault probability.-
Key words:
- niobium /
- stacking fault probability /
- Fe-22Mn-0.4C alloy /
- mechanical property /
- deformation mechanism
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