Microstructural evolution and change in hardness during creep of NF709 austenitic stainless steel

doi:10.11890/1006-7191-113-220

Acta Metallurgica Sinica (English Letters) ›› 2011, Vol. 24 ›› Issue (3): 220-224.DOI: 10.11890/1006-7191-113-220

Previous Articles Next Articles

Microstructural evolution and change in hardness during creep of NF709 austenitic stainless steel

Yan ZHAO¹, Jie ZHAO¹, Xiaona LI²

1. School of Material Science and Engineering, Dalian University of Technology, Dalian 116085, China
2. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams of Ministry of Education, Dalian University of Technology, Dalian 116085, China

Received:2010-12-01 Revised:2011-02-22 Online:2011-06-25 Published:2011-06-13
Contact: Jie ZHAO

Abstract

Abstract: Microstructural evolution and the change in hardness during creep deformation of NF709 austenitic stainless steel were investigated. Creep tests were carried out at 650 ℃ for 2932 h under a load of 210 MPa for comparison with aging specimen at 650 ℃ for 3000~h. The hardness results indicated that applied stress during creep process induced hardness increase. Analysis of longitudinal section microstructure showed that the creep damage caused by pores and the grain boundary hardening caused by elongated grains could be the factors leading to hardness differences. The G phase dispersedly precipitated in intragranular and interacted with dislocations during creep process, indicating strain hardening.

Key words: NF709, Creep-introduced, Hardness, Microstructural evolution

Yan ZHAO, Jie ZHAO, Xiaona LI. Microstructural evolution and change in hardness during creep of NF709 austenitic stainless steel[J]. Acta Metallurgica Sinica (English Letters), 2011, 24(3): 220-224.

[1]	Tianbo Zhao, Yutaka S. Sato, Hiroyuki Kokawa, Kazuhiro Ito. Predicting Tensile Properties of Friction-Stir-Welded 6063 Aluminum with Experimentally Measured Welding Heat Input [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(9): 1235-1242.
[2]	Yuan Yu, Peiying Shi, Kai Feng, Jiongjie Liu, Jun Cheng, Zhuhui Qiao, Jun Yang, Jinshan Li, Weimin Liu. Effects of Ti and Cu on the Microstructure Evolution of AlCoCrFeNi High-Entropy Alloy During Heat Treatment [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(8): 1077-1090.
[3]	Yunhai Su, Xuewei Liang, Yunqi Liu, Zhiyong Dai. Effect of Ti Addition on the Microstructure and Property of FeAlCuCrNiMo_0.6 High-Entropy Alloy [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(7): 957-967.
[4]	Yue Su, Shun-Cun Luo, Liang Meng, Piao Gao, Ze-Min Wang. Selective Laser Melting of In Situ TiB/Ti6Al4V Composites: Formability, Microstructure Evolution and Mechanical Performance [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(6): 774-788.
[5]	Jin Hyuk Choi, Gobinda Gyawali, Dhani Ram Dhakal, Bhupendra Joshi, Soo Wohn Lee. Electrodeposited Ni-W-TiC Composite Coatings: Effect of TiC Reinforcement on Microstructural and Tribological Properties [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(4): 573-582.
[6]	Sami Bin Humam, Gobinda Gyawali, Dhani Ram Dhakal, Jin-Hyuk Choi, Soo Wohn Lee. Effect of Pulse and Direct Current Electrodeposition on Microstructure, Surface, and Scratch Resistance Properties of Ni-W Alloy and Ni-W-SiC Composite Coatings [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(10): 1321-1330.
[7]	Xiang-Qian Liu, Hui-Jie Liu, Yan Yu. Relationship Between Microstructures and Microhardness in High-Speed Friction Stir Welding of AA6005A-T6 Aluminum Hollow Extrusions [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(1): 115-126.
[8]	Xiao Li, Bo Guan, Yun-Fei Jia, Yun-Chang Xin, Cheng-Cheng Zhang, Xian-Cheng Zhang, Shan-Tung Tu. Microstructural Evolution, Mechanical Properties and Thermal Stability of Gradient Structured Pure Nickel [J]. Acta Metallurgica Sinica (English Letters), 2019, 32(8): 951-960.
[9]	Shuang-Jian Chen, Xiang-Xi Ye, D.K. L.Tsang, Li Jiang, Chao-Wen Li, Kun Yu, Zhi-Jun Li . Microstructure and Its Influence on the Mechanical Properties of Ni-28W-6Cr-Based Alloy-Welded Joints by GTAW [J]. Acta Metallurgica Sinica (English Letters), 2019, 32(8): 1032-1040.
[10]	N. Thangapandian, S. Balasivanandha Prabu , K. A. Padmanabhan. Effect of Temperature on Grain Size in AA6063 Aluminum Alloy Subjected to Repetitive Corrugation and Straightening [J]. Acta Metallurgica Sinica (English Letters), 2019, 32(7): 835-844.
[11]	Barros André, Cruz Clarissa, P. Silva Adrina, Cheung Noé, Garcia Amauri, Rocha Otávio, Moreira Antonio. Horizontally Solidified Al-3 wt%Cu-(0.5 wt%Mg) Alloys: Tailoring Thermal Parameters, Microstructure, Microhardness, and Corrosion Behavior [J]. Acta Metallurgica Sinica (English Letters), 2019, 32(6): 695-709.
[12]	An-Wen Zhang, Yang Li, Sha Zhang, Fang Liu, Wei-Hong Zhang, Lian-Xu Yu, Wen-Ru Sun. Re-recognition of the Effects of Phosphorus and Boron on the γ″ and γ′ Phases in IN718 Alloy [J]. Acta Metallurgica Sinica (English Letters), 2019, 32(3): 372-380.
[13]	En-Yang Liu, Si-Rong Yu, Ming Yuan, Fan-Guo Li, Yan Zhao, Wei Xiong. Effects of Semi-solid Isothermal Heat Treatment on Microstructures and Damping Capacities of Fly Ash Cenosphere/AZ91D Composites [J]. Acta Metallurgica Sinica (English Letters), 2018, 31(9): 953-962.
[14]	Ge Bian, Ming Cheng, Yang Liu, Shi-Hong Zhang. Wear Behaviors of GH4169 Super Alloy and 3Cr2W8V Tool Steel Under Dry Rolling Condition [J]. Acta Metallurgica Sinica (English Letters), 2018, 31(9): 983-996.
[15]	Jin-Long Fu, Hong-Jun Jiang, Kai-Kun Wang. Influence of Processing Parameters on Microstructural Evolution and Tensile Properties for 7075 Al Alloy Prepared by an ECAP-Based SIMA Process [J]. Acta Metallurgica Sinica (English Letters), 2018, 31(4): 337-350.

Microstructural evolution and change in hardness during creep of NF709 austenitic stainless steel

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments