Effect of natural aging on microstructure and properties of GT35 alloy

doi:10.13251/j.issn.0254-6051.2020.01.014

Abstract

Abstract: The influence of the natural aging process on the microstructure and performance of GT35 alloy was studied by characterizing the alloy phases, microstructure, residual stress, Vickers hardness and linear expansion rate via XRD, SEM, iXRD, Vickers hardness tester and lengthmeasuring machine.The results show that the TiC particle morphology and size have no obvious changes during the natural aging process. The Vickers hardness, residual stress and linear expansion rate of the GT35 alloy increase gradually when the natural aging time is less than 15 days, while they decrease when exceeding 15 days. The microstructure and performance are stable after natural aging for more than 90 days, and the Vickers hardness, residual stress and linear expansion rate is 945.7 HV5, -184 MPa, and -2.22×10 ^-5, respectively.

Key words: GT35 alloy, natural aging, microstructure, properties, stability

CLC Number:

TG161
TG156

Xiao Lairong, Wei Daoming, Zhao Xiaojun, Cai Zhenyang, Piao Shengming. Effect of natural aging on microstructure and properties of GT35 alloy[J]. HTM, 2020, 45(1): 65-68.

References

[1]Wang X, Wu G, Sun D, et al. Micro-yield property of sub-micron Al₂O₃ particle reinforced 2024 aluminum matrix composite[J]. Materials Letters, 2004, 58(3/4): 333-336.
[2]Uju W A, Oguocha I N A. Thermal cycling behaviour of stir cast Al-Mg alloy reinforced with fly ash[J]. Materials Science and Engineering A (Structural Materials: Properties, Microstructure and Processing), 2009, 526(1/2): 100-105.
[3]Lin S, Xiong W. Microstructure and abrasive behaviors of TiC-316L composites prepared by warm compaction and microwave sintering[J]. Advanced Powder Technology, 2012, 23(3): 419-425.
[4]Xiao Yulin. Steel boned carbides are reliable guides for China's space flight programme[J]. Metal Powder Report, 2007, 62(4): 16-18.
[5]张迎晖, 谢健明, 刘欣, 等. 微合金化S355钢的第二相析出行为[J]. 金属热处理, 2018, 43(8): 55-59.
Zhang Yinghui, Xie Jianming, Liu Xin, et al. Secondary phase precipitation behavior of microalloyed S355 steel[J]. Heat Treatment of Metals, 2018, 43(8): 55-59.
[6]Wang Z, Lin T, He X, et al. Fabrication and properties of the TiC reinforced high-strength steel matrix composite[J]. International Journal of Refractory Metals and Hard Materials, 2016, 58: 14-21.
[7]Song Y F, Ding X F, Xiao L R, et al. Effects of two-stage aging on the dimensional stability of Al-Cu-Mg alloy[J]. Journal of Alloys and Compounds, 2017, 701: 508-514.
[8]Song Y F, Ding X F, Zhao X J, et al. The effect of SiC addition on the dimensional stability of Al-Cu-Mg alloy[J]. Journal of Alloys and Compounds, 2018, 750(25): 111-116.
[9]王秀芳, 武高辉, 姜龙涛, 等. 冷热循环处理对SiCp/2024Al尺寸稳定性的影响[J]. 材料热处理学报, 2006, 27(1): 23-27.
Wang Xiufang, Wu Gaohui, Jiang Longtao, et al. Effect of thermal-cold cycling treatment on dimensional stability of SiCp/2024Al composite[J]. Transactions of Materials and Heat Treatment, 2006, 27(1): 23-27.
[10]田亚强, 王安东, 郑小平, 等. 高温形变对Q&P处理低碳钢中残留奥氏体稳定性的影响[J]. 金属热处理, 2018, 43(6): 106-120.
.
Tian Yaqiang, Wang Andong, Zheng Xiaoping, et al. Effect of high temperature deformation on stability of retained austenite for Q＆P treated low carbon steel[J]. Heat Treatment of Metals, 2018, 43(6): 106-120.
[11]Song Y F, Ding X F, Zhao X J, et al. The effect of stress-aging on dimensional stability behavior of Al-Cu-Mg alloy[J]. Journal of Alloys and Compounds, 2017, 718: 298-303.
[12]Hidalgo J, Findley K O, Santofimia M J. Thermal and mechanical stability of retained austenite surrounded by martensite with different degrees of tempering[J]. Materials Science and Engineering A, 2017, 690: 337-347.
[13]黄树海, 赵祖德, 肖远伦, 等. 冷热循环对铝合金锥形件淬火残余应力和加工变形的影响[J]. 机械工程学报, 2010, 46(14): 73-78.
Huang Shuhai, Zhao Zude, Xiao Yuanlun, et al. Influence of thermal—cooling cycle on both quenching—induced residual stress and machining-induced distortion of aluminum cone-shaped part[J]. Journal of Mechanical Engineering, 2010, 46(14): 73-78.
[14]胡生双, 王浩军, 杨平, 等. 30CrMnSiA钢的深冷处理[J]. 金属热处理, 2018, 43(11): 178-181.
Hu Shengshuang, Wang Haojun, Yang Ping, et al. Cryogenic treatment of 30CrMnSiA steel[J]. Heat Treatment of Metals, 2018, 43(11): 178-181.
[15]Jegou S, Barrallier L, Fallot G. Gaseous nitriding behaviour of 33CrMoV12-9 steel: Evolution of the grain boundaries precipitation and influence on residual stress development[J]. Surface and Coatings Technology, 2018, 339: 78-90.