Fabrication of ultra-high strength magnesium alloys over 540 MPa with low alloying concentration by double continuously extrusion

Fabrication of ultra-high strength magnesium alloys over 540 MPa with low alloying concentration by double continuously extrusion
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双连续挤压法制备低合金浓度540MPa以上超高强度镁合金

DOI:
10.1016/j.jma.2018.04.003
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发表时间:
2018-06
影响因子:
17.6
通讯作者:
Wenjiang Ding
Wenjiang Ding
中科院分区:
材料科学1区
文献类型:
--
作者:
Hua Huang;Hongwei Miao;Guangyin Yuan;Zhongchang Wang;Wenjiang Ding

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我们制备了一种新型专利可生物降解生物医用Mg-Nd-Zn-Zr(JDBM)合金体系,并进行双连续挤压(DCE)加工。 JDBM-2.1Nd的最低加工温度为250°C,JDBM-2.8Nd的最低加工温度为310°C,随着Nd浓度的增加而升高。 JDBM-2.1 Nd样品在250℃挤压时达到了541MPa的最高屈服强度,伸长率约为3.7%。而且,合金元素含量较低的合金在DCE加工后可以达到较高的屈服强度,而合金元素含量较高的合金可以达到较大的延伸率。然而,在相同条件下挤压时,合金含量较高的合金表现出更好的拉伸性能。
We prepare a new type of patented biodegradable biomedical Mg–Nd–Zn–Zr (JDBM) alloy system and impose double continuously extrusion (DCE) processing. The lowest processing temperature is 250 °C for JDBM-2.1Nd and 310 °C for JDBM-2.8Nd, which increases with the Nd concentration. The highest yield strength of 541 MPa is achieved in JDBM-2.1 Nd samples when extruded at 250 °C and the elongation is about 3.7%. Moreover, the alloy with a lower alloying element content can reach a higher yield strength while that with a higher alloying element content can reach a larger elongation after DCE processing. However, when extruded under the same conditions, the alloy with a higher alloying contents exhibits better tensile properties.
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