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首页> 外文期刊>Materials Science and Engineering >Mechanical properties of Al-Si_(13)-Ni_(1.4)-Mg_(1.4)-Cu_1 alloys produced by the Ohno continuous casting process
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Mechanical properties of Al-Si_(13)-Ni_(1.4)-Mg_(1.4)-Cu_1 alloys produced by the Ohno continuous casting process

机译：大野连铸生产的Al-Si_（13）-Ni_（1.4）-Mg_（1.4）-Cu_1合金的力学性能

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摘要

Examination of the mechanical properties of cast aluminum alloys (AC8A: Al-Si_(13)-Ni_(1.4)-Mg_(1.4)-CU_1), created by the Ohno continuous casting (OCC) process, was conducted. The material strength and ductility of the OCC samples are twice as high as the same aluminum alloy produced by conventional gravity casting. The increase of material strength of the OCC sample is attributed to (ⅰ) tiny spherical a-Al grains, (ⅱ) fewer cast defects and (ⅲ) solid-solution strengthening by silicon. The high material ductility of the OCC sample is related to the regularly oriented crystal structure, where the crystal direction (111) in the cast sample is perpendicular to the casting direction, and (110) and (100) directions can be detected in the longitudinal direction of the sample. The yield stress of the OCC sample can be estimated by two different parameters: solid-solution strengthening, kc~(1/2), and grain size, k_y/d~(1/2) (Hall-Petch relation).
机译：对通过大野连铸（OCC）工艺产生的铸造铝合金（AC8A：Al-Si_（13）-Ni_（1.4）-Mg_（1.4）-CU_1）的机械性能进行了测试。 OCC样品的材料强度和延展性是传统重力铸造生产的相同铝合金的两倍。 OCC样品的材料强度增加归因于（ⅰ）微小的球形a-Al晶粒，（ⅱ）较少的铸造缺陷和（ⅲ）硅固溶强化。 OCC样品的高材料延展性与规则取向的晶体结构有关，其中铸造样品中的晶体方向（111）垂直于铸造方向，并且可以在纵向方向检测（110）和（100）方向样品的方向。 OCC样品的屈服应力可以通过两个不同的参数来估算：固溶强化kc〜（1/2）和晶粒尺寸k_y / d〜（1/2）（霍尔-皮奇关系）。

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