航天推进技术研究院主办
[1]苏鹏程,赵长安,王佩艳,等.激光增材制造镍基高温合金的高温变形行为与本构模型[J].火箭推进,2024,50(01):135-146.[doi:10.3969/j.issn.1672-9374.2024.01.013]
SU Pengcheng,ZHAO Chang'an,WANG Peiyan,et al.High temperature deformation behavior and constitutive model of laser additive manufactured Nickel-based superalloy[J].Journal of Rocket Propulsion,2024,50(01):135-146.[doi:10.3969/j.issn.1672-9374.2024.01.013]
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SU Pengcheng,ZHAO Chang'an,WANG Peiyan,et al.High temperature deformation behavior and constitutive model of laser additive manufactured Nickel-based superalloy[J].Journal of Rocket Propulsion,2024,50(01):135-146.[doi:10.3969/j.issn.1672-9374.2024.01.013]
激光增材制造镍基高温合金的高温变形行为与本构模型
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
50
期数:
2024年01期
页码:
135-146
栏目:
目次
出版日期:
2024-02-28
- Title:
- High temperature deformation behavior and constitutive model of laser additive manufactured Nickel-based superalloy
- 文章编号:
- 1672-9374(2024)01-0135-12
- Keywords:
- nickel-based superalloy; constitutive model; rheological behavior; laser additive manufacturing; finite element simulation
- 分类号:
- V434.24
- 文献标志码:
- A
- 摘要:
- 开展了激光增材制造镍基高温合金在7种温度下的拉伸试验,通过断口分析、数据处理等手段研究了增材制造高温合金的破坏机制及本构模型。结果表明:镍基高温合金的屈服强度、抗拉强度随着温度的升高而降低; 温度高于673 K时,塑性段出现锯齿流变现象,随着温度的升高,锯齿的密度减小; 试件断口表面存在大量韧窝和撕裂棱,具有显著的韧性断裂特征; 通过考虑应变和温度对材料塑性行为的耦合影响,建立了以J-C和Z-A模型为基础来拟合合金流动应力的改进本构模型,拟合值和试验值吻合较好,相对误差绝对值均小于4%; 将有限元仿真结果和试验的载荷-位移曲线进行对比,进一步证明了所建立本构模型的准确性。
- Abstract:
- Tensile tests on laser additive manufactured of Nickel-based superalloy at seven temperatures are carried out. The failure mechanism and constitutive model of additive manufactured superalloy are studied through fracture analysis and data processing. The results show that the yield strength and tensile strength of Nickel-based superalloy decrease with the increase of temperature. When the temperature is higher than 673 K, the sawtooth flow phenomenon occurs in the plastic section, and the density of sawtooth decreases with the increase of temperature. There are a lot of dimples and tearing edges on the fracture surface of the specimen, exhibiting significant ductile fracture characteristics. By considering the coupling effect of strain and temperature on the plastic behavior of the material, an improved constitutive model based on J-C and Z-A models is established to fit the flow stress of the alloy. The fitting values are in good agreement with the experimental values, and the absolute values of relative errors are all less than 4%. The finite element simulation results are compared with the load-displacement curves of the test, which further proves the accuracy of the constitutive model.
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备注/Memo
收稿日期:2023- 09- 05 修回日期:2023- 10- 13
基金项目:国家重点实验室基金项目(2023LB013006); 中国航天科技集团有限公司自主研发项目
作者简介:苏鹏程(1998—),男,硕士,研究领域为金属疲劳与本构、增材制造技术。
通信作者:王佩艳(1984—),女,副教授,研究方向为金属和复合材料失效。
更新日期/Last Update:
1900-01-01