| 热诱导孔洞对FGH97高温合金性能的影响 |
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| 引用本文： | 张海,熊江英,王冲,马德新.热诱导孔洞对FGH97高温合金性能的影响[J].失效分析与预防,2019,14(2):90-95. |
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| 作者姓名： | 张海 熊江英 王冲 马德新 |
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| 作者单位： | 深圳市万泽中南研究院有限公司,广东深圳,518045;深圳市万泽中南研究院有限公司,广东深圳,518045;深圳市万泽中南研究院有限公司,广东深圳,518045;深圳市万泽中南研究院有限公司,广东深圳,518045 |
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| 基金项目： | 航空发动机高温合金材料及核心部件的制备技术研发;深圳市万泽中南研究院有限公司+新型研发机构初创期建设补助项目 |
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| 摘 要： | 利用金相设备和力学性能测试装置检测含不同孔隙率的FGH 97高温合金的组织及力学性能，分析不同孔隙率对FGH97高温合金力学性能的影响。结果表明:随着孔隙率的增加，FGH97高温合金的室温屈服强度和抗拉强度降低，延伸率下降；Charpy冲击功随着孔隙率增加而显著下降；FGH97高温合金的拉伸和冲击断裂机制为微孔聚集型断裂，拉伸和冲击断口呈现大量韧窝特征；热诱导孔洞会促进裂纹的萌生和扩展。
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| 关 键 词： | FGH97粉末高温合金 热诱导孔洞 显微组织 力学性能 断裂 |
| 收稿时间： | 2019-01-13 |
Effects of Thermal Induced Porosity on the Properties of FGH97 Powder Metallurgy Superalloys |
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| ZHANG Hai,XIONG Jiang-ying,WANG Chong,MA De-xin.Effects of Thermal Induced Porosity on the Properties of FGH97 Powder Metallurgy Superalloys[J].Failure Analysis and Prevention,2019,14(2):90-95. |
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| Authors: | ZHANG Hai XIONG Jiang-ying WANG Chong MA De-xin |
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| Abstract: | The microstructure and mechanical properties of FGH 97 powder metallurgy superalloys were investigated using Optical Microscopy and Scan Electrical Microscopy. The mechanical properties of FGH 97 powder metallurgy superalloys with the different porosity level were tested by universal testing machine and instrumented impact tester. The result showed that the yield strength, the tensile strength and the elongation decrease with the increase of the porosities level of the alloy. The impact toughness showed a dramatic decrease with the increase of porosity level of the alloy. The fracture surface shows a large amount of dimples and exhibit micro voids coalescence fracture. Thermal induced porosity promotes crack initiation and the principal crack tends to propagate along the path with high porosity. |
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