Transactions of Materials and Heat Treatment

Title：Influence of cold forging deformation on microstructure and tensile properties of Ti-9Al titanium alloy for car

Authors：

Unit：

KeyWords：

ClassificationCode：TG146.2

year,vol(issue):pagenumber：2019,44(4):157-161

Abstract：

The cold forging deformation treatment to Ti-9Al titanium alloy sample was conducted, and the influences of deformation amount on microstructure and mechanical properties were analyzed by EBSD, TEM and mechanical tensile methods. The results show that many large size isometric crystal microstructures are formed in the bar after solid solution treatment without deformation or shear bands. When the deformation amount is 20%, the proportion of LAGBs in the alloy matrix reaches about three times of the proportion of solid solution state, and the increasing rate of LAGBs proportion becomes slower when the cold forging deformation amount increases, and when the deformation amount reaches 60%, the proportion of LAGBs increases from the original 14% to 18%. After deformation treatment, the α phase in Ti-9Al titanium alloy decreases significantly from the original 29.2% before and after cold forging deformation. With the increasing of cold forging deformation amount, it shows the change law of monotonically decreasing. Furthermore, with the gradual increasing of cold forging deformation amount, the alloy maintains a certain plasticity, and the elongation at room temperature can still remain 6.8% when the cold forging deformation amount reaches 60%.

Funds：

山西省自然科学基金资助项目(20140321014-02)

韩兴言（1978-）男，硕士，讲师 E-mail：hanquanx533866@126.com

Reference：

[1]高守林,黄重国,雷鹍,等. 热处理对TC4钛合金富氧α层的影响[J].热加工工艺,2018,47 (20):243-246.

Gao S L, Huang C G, Lei K, et al. Effects of heat treatment on oxygen-rich α-layer of TC4 titanium alloy [J]. Hot Working Technology, 2018,47 (20): 243-246.

[2]张方，王林岐，赵松. 航空钛合金锻造技术的研究进展[J]. 锻压技术，2017，42（6）：1-6.

Zhang F，Wang L Q，Zhao S. Research development on forging technology for aviation titanium alloys[J]. Forging & Stamping Technology，2017，42（6）：1-6.

[3]郑念庆，张永强，和永岗，等. 显微组织对TA11钛合金棒材力学性能的影响[J]. 锻压技术，2017，42（8）：146-151.

Zheng N Q，Zhang Y Q，He Y G，et al. Influence of microstructure on mechanical properties of titanium alloy TA11 bar [J]. Forging & Stamping Technology，2017，42（8）：146-151.

[4]程好,冯爱新,黄宇,等. TC4钛合金薄板激光填丝焊接头成形与组织研究[J].热加工工艺,2018,47(19):94-96.

Cheng H, Feng A X, Huang Y, et al. Joint formation and microstructure of laser filler wire welding [J]. Hot Working Technology, 2014, 47(19):94-96.

[5]苏娟华,孙浩,任凤章,等. XRD的TA10钛合金热压缩变形后位错演化分析[J].哈尔滨工程大学学报,2019, 40 (2):1-8.

Su J H, Sun H, Ren F Z, et al. Dislocation evolution analysis of hot compressive deformed TA10 titanium alloy based on the XRD [J]. Journal of Harbin Engineering University,2019,40(2):1-8.

[6]周盛武,董洪波,姜智勇,等. TB17钛合金热压缩流变应力分析及本构方程[J].塑性工程学报, 2018, 25(1): 218-223.

Zhou S W, Dong H B, Jiang Z Y, et al. Flow stress analysis and constitutive equation of TB17 titanium alloy during hot compression [J]. Journal of Plastic Engineering, 2008,25(1):218-223.

[7]杜舜尧,陈明和,朱知寿,等. 新型超高强钛合金TB17铣削加工表面完整性试验研究[J].组合机床与自动化加工技术, 2017, 28(4): 125-129.

Du S Y, Chen M H, Zhu Z S, et al. Experimental research on surface integrity of milling new ultra-high strength titanium alloy TB17 [J]. Modular Machine Tool & Automatic Manufacturing Technique, 2017, 28(4):125-129.

[8]Naofumi I, Tatsuro M, Kazuhiro T S, et al. Influence of cold rolling on fundamental properties of Ti-15V-3Cr-3Sn-3Al alloy [J]. Mater. Trans., 2015, 56(11): 1-7.

[9]费跃,王新南,商国强,等. 冷却速度对TB17合金组织及硬度的影响[J].稀有金属,2017,41(9):1056-1060.

Fei Y, Wang X N, Shang G Q, et al. Microstructure evolution and hardness of TB17 alloy at different cooling rates [J]. Chinese Journal of Rare Metals, 2017,41(9):1056-1060.

[10]王哲,王新南,祝力伟,等. TB17钛合金β相区晶粒长大行为[J].钛工业进展,2016,33(6):11-15.

Wang Z, Wang X N, Zhu L W, et al. Grain growth behavior in β single phase of TB17 titanium alloy [J]. Titanium Industry Progress, 2016,33(6):11-15.

[11]王哲,王新南,祝力伟,等. TB17钛合金等温时效析出行为[J].航空材料学报,2016,36(5):1-6.

Wang Z, Wang X N, Zhu L W, et al. Isothermal aging precipitate of TB17 titanium alloy [J]. Journal of Aeronautical Materials, 2016, 36(5):1-6.

[12]郑帮智，唐新新，田晓琳，等. 计算机应用钛合金线材旋锻数值仿真中夹具与锤头相对运动的处理方法[J]. 锻压技术，2017，42（10）：195-202.

Zheng B Z，Tang X X，Tian X L，et al. Treatment methods on relative motion between clamp and hammer in numerical simulation of rotary forging for titanium alloy wire[J]. Forging & Stamping Technology，2017，42（10）：195-202.

Service：

【This site has not yet opened Download Service】【Add Favorite】