Ultrastrong Mg Alloy via Nano-spaced Stacking Faults

By W. Jian, G. Cheng, Weizong Xu, H. Yuan, Ming-Hung Tsai, Q. D. Wang, C. Koch, Y. Zhu, S. Mathaudhu. 2013

330 citations recorded by the source corpus.

Mg alloys are among the lightest alloys but they are usually weak. Here we report a new mechanism to make them ultrastrong while maintaining good ductility. Stacking faults with nanoscale spacing were introduced into a Mg–8.5Gd–2.3Y–1.8Ag–0.4Zr (wt%) alloy by conventional hot rolling, which produced a yield strength of ∼575 MPa, an ultimate strength of ∼600 MPa, and a uniform elongation of ∼5.2 %. Low stacking fault (SF) energy enabled the introduction of a high density of SFs, which impeded dislocation slip and promoted dislocation accumulation. These findings provide guidance for developing Mg alloys with superior mechanical properties.

Subfields: Biomaterials, Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/276fe49409315909cbee49bcc4d6dbd27af8a0db

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In Biomaterials

1. Yuntian Zhu
2. R. Valiev
3. Xiaolei Wu
4. Christopher Smith
5. Yongjun Chen
6. Zhigang Xu
7. Jagannathan Sankar
8. Terence G. Langdon

In Materials Chemistry

1. Yuntian Zhu
2. Xiaolei Wu
3. I. Ovid’ko
4. R. Valiev
5. Longxin Chen
6. Terence G. Langdon
7. Xiaozhou Liao
8. Z. Horita

In Mechanical Engineering

1. Yuntian Zhu
2. Xiaolei Wu
3. I. Ovid’ko
4. R. Valiev
5. Longxin Chen
6. Terence G. Langdon
7. Z. Horita
8. Xiaozhou Liao

Citations in the corpus

• Synergetic Strengthening by Gradient Structure (2014, methodology): “Making materials both strong and ductile has been an enduring endeavor for materials scientists.[8,18,19] Here, we report that gradient structure in metals produces an intrinsic synergetic strengthening effect, with the strength of the gradient-structured (GS) sample much higher than the sum of the ”
• Recent advances on the development of magnesium alloys for biodegradable implants. (2014, background): “[64] introduced nanospaced stacking faults into the Mg– 8.”
• Alloys for Aeronautic Applications: State of the Art and Perspectives (2019, background): “[126], and is based on stacking faults (SFs) with nanometric spacings, induced by hot rolling.”
• Review on superior strength and enhanced ductility of metallic nanomaterials (2018, background): “The high density of stacking faults consequently produced high strength and good ductility [122,123].”