深拉伸用钢:第一部分
非铁合金的热机械处理(TMT):第一部分
DataPLUS 模块提供上万种金属材料和非金属材料的腐蚀数据、焊接性能、尺寸与公差信息以及涂层信息。 点击这里了解更多。
Overview of Total Materia database 2022 年 1月 12日
Overview of Total Materia database 2022 年 1月 13日
在使用Total Materia几个月之后,以及深刻体验过所有潜在功能之后,我非常感谢你们的卓越工作和持续稳定的升级服务。 Total Materia始终是用来达成这一目的唯一工具。
M. Manfredini Bonfiglioli Industrial Gearmotors 博洛尼亚, 意大利
我们的目标很简单,就是让 Total Materia成为全球工程师在材料领域的首选一站式解决方案
Prof. Dr. Viktor Pocajt, CEOKey to Metals AG
Weight savings, good mechanical properties, corrosion resistance are key factors in making magnesium-zirconium alloys a preferred structural material choice in automotive and aerospace applications. Zirconium is particularly useful for influencing grain size control for which magnesium alloys without this inclusion have a tendency to display characteristic grain growth.
Magnesium alloys are an important structural material in aerospace and car industries, as well as in some other areas. Their main characteristics are small specific weight, good mechanical properties, good processing and resistance to corrosion.
Generally, Mg alloys contain one or two primary alloying elements. The Mg alloys are mainly based on three binary systems: Mg-Al, Mg-Zn and Mg-Zr.
The magnesium alloys without zirconium show a strong tendency for grain growth. Non-alloy magnesium can undergo cold deformation up to 5-10%. Addition 0.5wt%Zr yields a grain size refinement, which makes a cold deformation up to 30% possible. Above 220°C, hot deformation is possible, with certain preference of extrusion above rolling. The compression of the cross-section during extrusion limits the risk of crack formation. The temperature of hot deformation is generally chosen below 400°C in order to limit oxidation and to prevent excessive grain growth of the alloys without zirconium.
Zirconium however, is one of the primary candidates of alloying element with Mg for the development of biodegradable Mg alloys. More importantly Zr is an effective alloying element to improve both the strength and the corrosion resistance of Mg alloys. Grain size control is very important for Mg alloys.
It is well known that Zr additions to pure magnesium or appropriate alloys reduces the grain size by an order of magnitude or more, compared to non-Zr containing alloys, with consequent beneficial effects on mechanical properties and casting characteristics. However, Mg alloys with Zr are more expensive than the alloys without Zr, which is why for consumer products mainly Zr free alloys are used.
Figure 1 presents the Mg-rich corner of the phase diagram Mg-Zr. The solubility of Zr in liquid Mg is very small. The binary Mg-Zr alloys do not have sufficient strength for engineering applications. An amount of only 0.5% Zr added to the melt is already sufficient for grain refinement. In the alloys with Zr, hydrogen, aluminum and manganese should be avoided in view of the development of undesired chemical compounds. The addition of rare earth elements and thorium in combination with Zr or Mn improves the high temperature strength.
Date Published: Apr-2015
输入搜索词:
搜索项
全文 关键字
标题 摘要
Total Materia has mechanical properties inserted for many thousands of materials and accessing them is just a click of a button away.
Covering a wide variety of property information, it is easy to find yield stress, tensile stress and elongation data for a huge number of materials within the database.
Enter the material of interest into the quick search field. You can optionally narrow your search by specifying the country/standard of choice in the designated field and click Search.
Total Materia will generate the search list for you to select the material of interest from the material list. Click on the material of interest.
On the subgroup page, click the Mechanical Properties link to view property data for the selected material. The number of mechanical property data records is displayed in brackets next to the link.
The mechanical properties data will be then be displayed along with all selected material information for your reference.
The mechanical properties data will be displayed for all available conditions and treatments.
It is also possible to switch between metric (SI) and Anglo-Saxon units with one click depending on your preference.
For you’re a chance to take a test drive of the Total Materia database, we invite you to join a community of over 150,000 registered users through the Total Materia Free Demo.