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    Aluminum Alloys Versus Types Of Steel

    新疆18选7 www.tpr19.com Aluminum alloys typically have an elastic modulus of about 70 GPa, which is about one-third of the elastic modulus of most kinds of steel and steel alloys. Therefore, for a given load, a component or unit made of an aluminum alloy will experience a greater elastic deformation than a steel part of the identical size and shape. Though there are aluminum alloys with somewhat-higher tensile strengths than the commonly used kinds of steel, simply replacing a steel part with an aluminum alloy might lead to problems. 

    With completely new metal products, the design choices are often governed by the choice of manufacturing technology. Extrusions are particularly important in this regard, owing to the ease with which aluminum alloys, particularly the Al–Mg–Si series, can be extruded to form complex profiles. Aluminum alloys such as aluminum alloy 7020 are widely used in engineering structures and components where light weight or corrosion resistance is required.
     
    In general, stiffer and lighter designs can be achieved with aluminum alloys than is feasible with steels. For instance, consider the bending of a thin-walled tube: the second moment of area is inversely related to the stress in the tube wall, i.e. stresses are lower for larger values. The second moment of area is proportional to the cube of the radius times the wall thickness, thus increasing the radius by 26% will lead to a halving of the wall stress. 6061 aluminum alloy is a precipitation hardening aluminum alloy, containing magnesium and silicon as its major alloying elements. Originally called "Alloy 61S," it was developed in 1935. For this reason, bicycle frames made of aluminum alloys make use of larger tube diameters than steel or titanium in order to yield the desired stiffness and strength. In automotive engineering, cars made of aluminum alloys employ space frames made of extruded profiles to ensure rigidity. This represents a radical change from the common approach for current steel car design, which depends on the body shells for stiffness that is a unibody design. 

    Aluminum alloys are widely used in automotive engines, particularly in cylinder blocks and crankcases due to the weight savings that are possible. Since aluminum alloys are susceptible to warping at elevated temperatures, the cooling system of such engines is critical. Manufacturing techniques and metallurgical advancements have also been instrumental for the successful application in automotive engines. In the 1960s, the aluminum cylinder heads of the Corvair earned a reputation for failure and stripping of threads, which is not seen in current aluminum cylinder heads. An important structural limitation of aluminum alloys is their lower fatigue strength compared to steel. In controlled laboratory conditions, steels display a fatigue limit, which is the stress amplitude below which no failures occur – the metal does not continue to weaken with extended stress cycles. Aluminum alloys do not have this lower fatigue limit and will continue to weaken with continued stress cycles. Aluminum alloys are therefore sparsely used in parts that require high fatigue strength in the high cycle regime (more than 107 stress cycles).[Source: Wikipedia] 

    aluminiumsupplier.com.cn formerly known as Guangdong Xingfa Aluminum Profile Factory was established in 1984. As one of the earliest enterprises engaged in aluminum profile in Mainland China, the Company has become a famous and large-scaled enterprise specialized in production of aluminum profiles for both architecture and industry, with its yearly capacity of 150,000 tons. The Company is the production base for aluminum alloy designated by the Ministry of Construction of China, and it was awarded "No.1 of Top-Ten National Aluminum Profile Enterprises".

  • 御乾堂红木独家赞助3D《清明上河图》东阳首秀 2019-05-11
  • 主持人资料库——曾子墨 2019-05-04
  • 其两个都是【最牛】。。。[哈哈] 2019-05-04
  • 流行风向标 助你石博会上淘宝 春城壹网 七彩云南 一网天下 2019-05-03
  • 树牢“四个意识” 扎实推进人大工作 2019-05-01
  • 腾讯孙忠怀:坚持正确导向 履行社会责任 2019-05-01
  • 火箭杜兰特一口价恐被勇士打劫?纵有3绝技也给不起6千万 2019-04-29
  • 候选企业:黑龙江飞鹤乳业有限公司 2019-04-29
  • 中国球迷在西葡大战现场举横幅:欢迎C罗来中超 2019-04-28
  • 四川乐山公交车爆炸案系人为 嫌疑人已被控制 2019-04-26
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  • 防治土地荒漠化 新疆保护生态兼顾农民增收 2019-04-25
  • 沁水一季度发放就业见习补贴65.28万元 2019-04-25
  • 买力亚木尼沙家的生日宴 2019-04-20
  • 你的第一段就认识错误。中国人如果认为神赐就能有幸福,就不会有后羿射日精卫填海愚公移山的故事了。中华文明世界观推导出的方法论就是八个字,事在人为,人定胜天。 2019-04-19