热诱导孔洞对FGH97高温合金性能的影响
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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。
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.
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.
引文
[1]郭茂文,刘春荣,郑雪萍,等.粉末高温合金的研究现状[J].热加工工艺,2017,46(20):11–13.
[2]郭建亭.高温合金材料与工程应用[M].北京:科学出版社,2010:93–98.
[3]刘明东,张莹,刘培英,等. FGH95粉末高温合金原始颗粒边界及其对性能的影响[J].粉末冶金工业,2006,16(3):1–5.
[4]Rao G A,Kumar M,Sarma D S. Effect of standard heat treatment on the microstructure and properties of hot isostatically pressed superalloy inconel 718[J]. Materials Science and Engineering A,2003,355:114–125.
[5]Rao G A,Srinivas M,Sarma D S. Effect of solution treatment temperature on microstructure and mechanical properties of hot isostatically pressed superalloy Inconel 718[J].Materials Science and Technology,2004,20(9):1161–1170.
[6]胡文波,贾成厂,胡本芙,等. FGH96合金原始颗粒边界(PPB)及其对冲击性能的影响[J].粉末冶金技术,2012,30(5):327–333.
[7]谢锡善,张丽娜,张麦仓,等.镍基粉末高温合金中夹杂物的微观力学行为研究[J].金属学报,2002,38(6):635–642.
[8]李晓,张麦仓,张丽娜,等.夹杂物对粉末冶金高温合金力学性能的影响[J].特殊钢,2001,22(1):25–28.
[9]张国星,韩寿波,孙志坤.热诱导孔洞对粉末冶金高温合金性能的影响[J].粉末冶金工业,2015,25(1):42–45.
[10]贾波,李春光.夹杂物对粉末高温合金损伤行为的影响[J].失效分析与预防,2006,1(2):29–32.
[11]马文斌,刘国权,胡本芙,等.粉末高温合金FGH96中的原始粉末颗粒边界及其对合金拉伸断裂行为的影响[J].粉末冶金材料科学与工程,2013,18(1):1–7.
[12]佴启亮,董建新,张麦仓,等.粉末高温合金FGH97疲劳裂纹扩展行为[J].工程科学学报,2016,38(2):248–256.
[13]Zhang L N,Wang P,Dong J X,et al. Microstructures’ effects on high temperature fatigue failure behavior of typical superal-loys[J]. Materials Science and Engineering A,2013,587:168–178.
[14]王盘鑫,邹仲元. FGH95和Rene 95合金热诱导孔隙的研究[J].北京钢铁学院学报,1987(2):118–123.
[15]刘明东,李科敏,黄虎豹,等.装套温度对FGH97合金制件组织性能的影响[J].粉末冶金工业,2017,27(2):28–31.
[16]国为民,吴剑涛,陈淦生,等.真空脱气预处理工艺与FGH95合金热诱导孔洞的改善和性能提高的研究[J].航空材料学报,2003,10(23):21–24.
[17]张莹.俄罗斯粉末高温合金涡轮盘的生产工艺[J].钢铁研究学报,2000,12(3):63–69.
[2]郭建亭.高温合金材料与工程应用[M].北京:科学出版社,2010:93–98.
[3]刘明东,张莹,刘培英,等. FGH95粉末高温合金原始颗粒边界及其对性能的影响[J].粉末冶金工业,2006,16(3):1–5.
[4]Rao G A,Kumar M,Sarma D S. Effect of standard heat treatment on the microstructure and properties of hot isostatically pressed superalloy inconel 718[J]. Materials Science and Engineering A,2003,355:114–125.
[5]Rao G A,Srinivas M,Sarma D S. Effect of solution treatment temperature on microstructure and mechanical properties of hot isostatically pressed superalloy Inconel 718[J].Materials Science and Technology,2004,20(9):1161–1170.
[6]胡文波,贾成厂,胡本芙,等. FGH96合金原始颗粒边界(PPB)及其对冲击性能的影响[J].粉末冶金技术,2012,30(5):327–333.
[7]谢锡善,张丽娜,张麦仓,等.镍基粉末高温合金中夹杂物的微观力学行为研究[J].金属学报,2002,38(6):635–642.
[8]李晓,张麦仓,张丽娜,等.夹杂物对粉末冶金高温合金力学性能的影响[J].特殊钢,2001,22(1):25–28.
[9]张国星,韩寿波,孙志坤.热诱导孔洞对粉末冶金高温合金性能的影响[J].粉末冶金工业,2015,25(1):42–45.
[10]贾波,李春光.夹杂物对粉末高温合金损伤行为的影响[J].失效分析与预防,2006,1(2):29–32.
[11]马文斌,刘国权,胡本芙,等.粉末高温合金FGH96中的原始粉末颗粒边界及其对合金拉伸断裂行为的影响[J].粉末冶金材料科学与工程,2013,18(1):1–7.
[12]佴启亮,董建新,张麦仓,等.粉末高温合金FGH97疲劳裂纹扩展行为[J].工程科学学报,2016,38(2):248–256.
[13]Zhang L N,Wang P,Dong J X,et al. Microstructures’ effects on high temperature fatigue failure behavior of typical superal-loys[J]. Materials Science and Engineering A,2013,587:168–178.
[14]王盘鑫,邹仲元. FGH95和Rene 95合金热诱导孔隙的研究[J].北京钢铁学院学报,1987(2):118–123.
[15]刘明东,李科敏,黄虎豹,等.装套温度对FGH97合金制件组织性能的影响[J].粉末冶金工业,2017,27(2):28–31.
[16]国为民,吴剑涛,陈淦生,等.真空脱气预处理工艺与FGH95合金热诱导孔洞的改善和性能提高的研究[J].航空材料学报,2003,10(23):21–24.
[17]张莹.俄罗斯粉末高温合金涡轮盘的生产工艺[J].钢铁研究学报,2000,12(3):63–69.