磷对Inconel 718形变合金力学性能的影响

来源期刊：中国有色金属学报1998年第3期

论文作者：唐宾 董建新 胡尧和 谢锡善

文章页码：385 - 389

关键词：高温合金； Inconel 718； 磷； 力学性能

Key words：superalloy； Inconel 718； phosphorous； mechanical property

摘    要：对国内生产的低磷Inconel 718(P含量＜0.001% )及常规Inconel 718(P含量为0.008%～0.013%)形变合金锻件的力学性能进行了对比研究。 结果表明， 室温拉伸强度和高温拉伸强度的差异不大， 然而低磷Inconel 718合金的高温塑性和650 ℃， 686 MPa的持久塑性明显降低； 更为值得注意的是，低磷合金在疲劳、蠕变和疲劳/蠕变交互作用下的抗裂纹扩展能力都低于常规合金； 而且低磷合金的595 ℃，895MPa缺口周期持久寿命有降低趋势。

Abstract: The mechanical properties of low phosphorous Inconel 718 (P<0.001%) and conventional Inconel 718 (P 0.00 8%~0.013%) deformation alloys were investigated. The results show that there is no obvious difference in room temperature and elevated temperature tensile strength between the low P content and conventional Inconel 718 alloys. However, the ductilities of the low P content alloy obviously decrease at 650 ℃, 686 MPa. The more important fact is that the crack propagation rates of the low P content alloy at 650 ℃ creep, futigue and creep/fatigue interaction conditions are higher than that of the conventional alloy, and it seems to have a tendency that the cycle notch stress rupture life of the low P alloy decreases at 595 ℃, 895 MPa.