Oxide nodule assisting fatigue crack initiation in hierarchical anisotropic nanostructured Mg-RE alloy

被引：5

作者：

Chen, Yao ^{[1
,2
]}

Shuai, Qi ^{[1
]}

Wu, Yujuan ^{[3
]}

Peng, Liming ^{[3
]}

Shao, Xiaohong ^{[4
]}

Liu, Fulin ^{[1
]}

He, Chao ^{[1
]}

Li, Lang ^{[1
]}

Liu, Yongjie ^{[1
]}

Wang, Qingyuan ^{[1
,5
]}

Xie, Shaoxiong ^{[2
,5
]}

Chen, Qiang ^{[2
]}

机构：

[1] Sichuan Univ, Failure Mech & Engn Disaster Prevent Key Lab Sichu, Chengdu 610065, Peoples R China

[2] Kyushu Univ, Dept Mech Engn, Fukuoka 8190395, Japan

[3] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Key State Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[4] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

[5] Chengdu Univ, Inst Adv Study, Chengdu 610106, Peoples R China

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2023年 / 175卷

基金：

中国国家自然科学基金;

关键词：

Magnesium alloy; Gigacycle fatigue; Fatigue crack initiation; Fatigue damage; Scattered oxide nodules; HIGH-CYCLE FATIGUE; GIGACYCLE FATIGUE; MAGNESIUM ALLOYS; GD; STRENGTH; BEHAVIORS;

D O I：

10.1016/j.ijfatigue.2023.107820

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Hierarchical anisotropic nanostructured Mg-RE alloys, containing LPSO lamellae and dense nano-precipitates, exhibit superior mechanical properties. However, their reliability as structural materials for long-term service, especially in terms of fatigue, is still a matter of concern. Here, scattered oxide nodules are detected as a special kind of fatigue damage that assists crack initiation, rather than the typical slip-band structure. The LPSO lamellae and dense & beta;& PRIME; nano-precipitates lead to the high localization of fatigue damage. The fatigue-induced oxide nodules form and grow within the soft & alpha;-Mg layer, but their growth is limited by the adjacent strong LPSO lamellae, resulting in microcrack nucleation. Finally, clusters of microcracks along the LPSO/oxide interface converge to form the trans-granular crack initiation.

引用

页数：14

共 33 条

[11] Formation of high-strength β′ precipitates in Mg-RE alloys: The role of the Mg/β" interfacial instability [J].

Issa, A. ;

Saal, J. E. ;

Wolverton, C. .

ACTA MATERIALIA, 2015, 83 :75-83

[12] The heterogeneity of persistent slip band nucleation and evolution in metals at the micrometer scale [J].

Lavenstein, Steven ;

Gu, Yejun ;

Madisetti, Dylan ;

El-Awady, Jaafar A. .

SCIENCE, 2020, 370 (6513) :190-+

[13] A simulation study of the shape of β′ precipitates in Mg-Y and Mg-Gd alloys [J].

Liu, H. ;

Gao, Y. ;

Liu, J. Z. ;

Zhu, Y. M. ;

Wang, Y. ;

Nie, J. F. .

ACTA MATERIALIA, 2013, 61 (02) :453-466

[14] Role of the LPSO structure in the improvement of corrosion resistance of Mg-Gd-Zn-Zr alloys [J].

Liu, Jing ;

Yang, Lixin ;

Zhang, Chunyan ;

Zhang, Bo ;

Zhang, Tao ;

Li, Yang ;

Wu, Kaiming ;

Wang, Fuhui .

JOURNAL OF ALLOYS AND COMPOUNDS, 2019, 782 :648-658

[15] Vacuum retarding and air accelerating effect on the high-cycle and very-high-cycle fatigue behavior of a ZK60 magnesium alloy [J].

Liu, Yongjie ;

Chen, Yao ;

He, Chao ;

Liu, Fulin ;

Yang, Kun ;

Li, Lang ;

Zhang, Hong ;

Wang, Chong ;

Wang, Qingyuan .

MATERIALS & DESIGN, 2021, 198

[16] A TEM investigation of naturally formed oxide films on pure magnesium [J].

Nordlien, JH ;

Ono, S ;

Masuko, N ;

Nisancioglu, K .

CORROSION SCIENCE, 1997, 39 (08) :1397-1414

[17] A Review on Casting Magnesium Alloys: Modification of Commercial Alloys and Development of New Alloys [J].

Pan, Fusheng ;

Yang, Mingbo ;

Chen, Xianhua .

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2016, 32 (12) :1211-1221

[18] Characterization and strengthening effects of γ′ precipitates in a high-strength casting Mg-15Gd-1Zn-0.4Zr (wt.%) alloy [J].

Rong, Wei ;

Wu, Yujuan ;

Zhang, Yu ;

Sun, Ming ;

Chen, Juan ;

Peng, Liming ;

Ding, Wenjiang .

MATERIALS CHARACTERIZATION, 2017, 126 :1-9

[19] A physically based fatigue model for prediction of crack initiation from persistent slip bands in polycrystals [J].

Sangid, Michael D. ;

Maier, Hans J. ;

Sehitoglu, Huseym .

ACTA MATERIALIA, 2011, 59 (01) :328-341

[20] Strengthening and toughening mechanisms in Mg-Zn-Y alloy with a long period stacking ordered structure [J].

Shao, X. H. ;

Yang, Z. Q. ;

Ma, X. L. .

ACTA MATERIALIA, 2010, 58 (14) :4760-4771

← 1 2 3 4 →