原位观察共晶硅对Al-20%Si合金裂纹形成与扩展的影响

doi:10.13251/j.issn.0254-6051.2020.06.040

金属热处理 ›› 2020, Vol. 45 ›› Issue (6): 194-196.DOI: 10.13251/j.issn.0254-6051.2020.06.040

原位观察共晶硅对Al-20%Si合金裂纹形成与扩展的影响

何绍付, 李青春, 赵帅, 陈淑英, 常国威

辽宁工业大学材料科学与工程学院, 辽宁锦州 121001

收稿日期:2019-12-22 出版日期:2020-06-25 发布日期:2020-09-02
通讯作者: 李青春,教授,硕士生导师,博生,E-mail: lqcsusan@126.com
作者简介:何绍付(1994—),男,硕士研究生,主要研究方向为金属凝固原理与控制技术,E-mail:hesfmat@163.com。
基金资助:
国家自然科学基金(5167040750)

Effect of eutectic silicon on crack formation and propagation of Al-20%Si alloy by in-situ observation

He Shaofu, Li Qingchun, Zhao Shuai, Chen Shuying, Chang Guowei

School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou Liaoning 121001, China

Received:2019-12-22 Online:2020-06-25 Published:2020-09-02

摘要/Abstract

摘要： 采用共聚焦激光扫描显微镜原位观察了Al-20%Si合金在拉伸过程中裂纹形成与扩展过程,研究了共晶硅对Al-20%Si合金裂纹形成、扩展的影响。结果发现:随固溶温度升高,Al-20%Si合金共晶硅粒化效果显著。铸态Al-20%Si合金拉伸过程中在针状共晶硅处容易产生裂纹,且裂纹主要在共晶硅之间扩展。经560 ℃固溶6 h,190 ℃时效10 h后,合金中针状共晶硅完全转变为颗粒状,有效降低了裂纹扩展速度,合金的抗拉强度和塑性明显提高。

关键词: 过共晶铝硅合金, 共晶硅, 裂纹, 原位观察

Abstract: Crack formation and propagation of Al-20%Si alloy were observed in-situ by using confocal laser scanning microscope, the effect of eutectic silicon on crack formation location and crack propagation mode of Al-20%Si alloy were studied. The results show that with the increase of solution temperature, the eutectic silicon phase in the Al-20%Si alloy changes into particles. During the tensile process, cracks easily occur at the needle-shaped eutectic silicon of the as-cast Al-20%Si alloy, and the cracks mainly propagate between the eutectic silicon. After solution at 560 ℃ for 6 h and aging at 190 ℃ for 10 h, the acicular eutectic silicon in the microstructure of the alloy transforms completely into granular silicon, the propagation rate is decreased, and the tensile strength and plasticity of the alloy are improved obviously.

Key words: hypereutectic aluminum silicon alloy, eutectic silicon, crack, in-situ observation

中图分类号:

TG146.2

何绍付, 李青春, 赵帅, 陈淑英, 常国威. 原位观察共晶硅对Al-20%Si合金裂纹形成与扩展的影响[J]. 金属热处理, 2020, 45(6): 194-196.

He Shaofu, Li Qingchun, Zhao Shuai, Chen Shuying, Chang Guowei. Effect of eutectic silicon on crack formation and propagation of Al-20%Si alloy by in-situ observation[J]. Heat Treatment of Metals, 2020, 45(6): 194-196.

参考文献

[1]Ludwig T H, Schaffer P L, Arnberg L. Influence of phosphorus on the nucleation of eutectic silicon in Al-Si alloys[J]. Metallurgical and Materials Transactions A, 2013, 44(13): 5796-5805.
[2]Dang B, Jian Z Y, Xu J F, et al. Effect of phosphorus and heat treatment on microstructure of Al-25%Si alloy[J]. China Foundry, 2017, 14(1): 10-15.
[3]Zhao L Z, Zhao M J, Song L J, et al. Ultra-fine Al-Si hypereutectic alloy fabricated by direct metal deposition[J]. Materials and Design, 2014, 56(4): 542-548.
[4]Pozdniakov A V, Glavatskikh M V, Makhov S V, et al. The synthesis of novel powder master alloys for the modification of primary and eutectic silicon crystals[J]. Materials Letters, 2014, 128(10): 325-328.
[5]Zhang Henghua, Duan Haili, Shao Guangjie, et al. Microstructure and mechanical properties of hypereutectic Al-Si alloy modified with Cu-P[J]. Rare Metals, 2008, 27(1): 59-63.
[6]李华基, 吴玉露, 胡慧芳. Al-24%Si过共晶合金的磷锶变质效果研究[J]. 热加工工艺, 2010, 39(17): 35-38.
Li Huaji, Wu Yulu, Hu Huifang. Study on influence of P and Sr on modification effects of hypereutectic Al-24%Si alloy[J]. Hot Working Technology, 2010, 39(17): 35-38.
[7]Wang J, He S, Sun B, et al. Effects of melt thermal treatment on hypoeutectic Al-Si alloys[J]. Materials Science and Engineering A, 2002, 338(1): 101-107.
[8]Feng H K, Yu S R, Li Y L, et al. Effrct of ultrasonic treatmeng on microstructures of hypereutectic Al-Si alloy[J]. Journal of Materials Processing Technology, 2008, 208: 330-335.
[9]Das A, Kotadia H R. Effect of high-intensity ulrasonic irradiation on the modification of solidification microstrostructure in a Si-rich hypoectectic Al-Si alloy[J]. Materials Chemistry and Physics, 2011, 125: 853-859.
[10]Dang B, Jian Z Y, Xu J F, et al. Effect of phosphorus and heat treatment on microstructure of Al-25%Si alloy[J]. China Foundry, 2017, 14(1): 10-15.
[11]Cheng S, Wang Y D, Choo H, et al. An assessment of the contributing factors to the superior properties of a nanostructured steel using in situ high-energy X-ray diffraction[J]. Acta Materialia, 2010, 58(7): 2419-2429.
[12]Blondé R, Jimenez-Melero E, Zhao L, et al. High-energy X-ray diffraction study on the temperature-dependent mechanical stability of retained austenite in low-alloyed TRIP steels[J]. Acta Materialia, 2012, 60(2): 565-577.
[13]Yan K, Liss K D, Timokhina I B, et al. In situ synchrotron X-ray diffraction studies of the effect of microstructure on tensile behavior and retained austenite stability of thermo-mechanically processed transformation induced plasticity steel[J]. Materials Science and Engineering A, 2016, 662: 185-197.
[14]Ran S, Nie Z, Fan Q, et al. Elastic plastic deformation of TC6 titanium alloy analyzed by in-situ synchrotron based X-ray diffraction and microstructure based finite element modeling[J]. Journal of Alloys and Compounds, 2016, 688: 787-795.
[15]Lu L, Huang J W, Fan D, et al. Anisotropic deformation of extruded magnesium alloy AZ31 under uniaxial compression: A study with simultaneous in situ synchrotron X-ray imaging and diffraction[J]. Acta Materialia, 2016, 120: 86-94.
[16]Lin J, Han X, Heuser B J, et al. Study of the mechanical behavior of the hydride blister/rim structure inzircaloy-4 using in-situ synchrotron X-ray diffraction[J]. Journal of Nuclear Materials, 2016, 471: 299-307.

原位观察共晶硅对Al-20%Si合金裂纹形成与扩展的影响

Effect of eutectic silicon on crack formation and propagation of Al-20%Si alloy by in-situ observation

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	杨杰, 汪西, 周杰, 武建祥, 屈志远, 代合平, 彭海军. 转向节锻件枝丫结构淬火裂纹形成机理[J]. 金属热处理, 2022, 47(4): 263-267.
[2]	董瑞, 陈林, 岑耀东, 包喜荣. 不同热处理条件下贝氏体钢的微观组织和疲劳裂纹扩展[J]. 金属热处理, 2022, 47(2): 153-158.
[3]	王春华, 王峰, 王凤良, 房洪杰, 杨丽娟. 多级固溶对7136-0.35La铝合金组织与性能的影响[J]. 金属热处理, 2021, 46(9): 124-128.
[4]	周建波, 张晶, 张蕾涛, 李海涛, 樊帅奇, 徐金富. 激光工艺参数对Ni60/WC涂层裂纹率及组织的影响[J]. 金属热处理, 2021, 46(9): 252-257.
[5]	聂小龙, 高加强, 孟开仁, 王军艺, 刘新宽. 60Si2Mn弹簧钢的断裂失效分析[J]. 金属热处理, 2021, 46(8): 246-249.
[6]	许鸿翔, 王红伟, 张衡, 汪军, 赵少甫. 20Cr2Ni4钢齿轮渗碳淬火及装配后开裂原因分析[J]. 金属热处理, 2021, 46(8): 250-253.
[7]	杨庆旭, 王学, 马君鹏, 杨超. 超超临界锅炉水冷壁T23/12Cr1MoV异种钢焊接接头焊后热处理裂纹分析[J]. 金属热处理, 2021, 46(7): 218-222.
[8]	宋全, 淡婷, 李晓光, 高明森, 曹辉辉. W6Mo5Cr4V2Al高速钢麻花钻断裂原因分析[J]. 金属热处理, 2021, 46(7): 229-232.
[9]	吕晶, 杨其全, 张倩, 胡杰, 许鑫. 铸钢轮装制动盘螺栓孔裂纹产生原因分析[J]. 金属热处理, 2021, 46(7): 238-241.
[10]	吉国强, 葛贵明, 于丽娟, 钟继志. 50CrV4钢垫圈开裂原因分析[J]. 金属热处理, 2021, 46(7): 254-257.
[11]	肖大恒, 张雅静, 何航, 脱臣德, 袁睿, 武会宾. 100 mm厚S420高强钢的热处理工艺及焊接性能[J]. 金属热处理, 2021, 46(6): 107-110.
[12]	赵平. 超临界循环流化床锅炉高温过热器管开裂原因分析[J]. 金属热处理, 2021, 46(6): 225-230.
[13]	焦丽, 商海昆, 何剑丰, 赵英军, 张伟民, 李卫民, 周兰梅. 柴油机用42CrMo钢高强度螺栓断裂失效分析[J]. 金属热处理, 2021, 46(6): 245-249.
[14]	米佩, 孙永鹏, 张勇. 矿用齿轨感应淬火裂纹产生原因及改进方法[J]. 金属热处理, 2021, 46(6): 250-252.
[15]	张蕾涛, 李海涛, 贾润楠, 王喆, 樊帅奇, 王雪松, 戴娇燕, 徐金富. 激光重熔Ni60/50%WC复合涂层的制备及性能[J]. 金属热处理, 2021, 46(5): 229-234.