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首页> 外文期刊>鋳造工学 >Age-hardening characteristics of Al2O3 continuous fiber reinforced Al-Si-Cu alloys
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Age-hardening characteristics of Al2O3 continuous fiber reinforced Al-Si-Cu alloys

机译：Al2O3连续纤维增强Al-Si-Cu合金的年龄硬化特性

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摘要

The age-hardening process of A12 O3 continuousfiber reinforced Al-Si-Cu and Al-Si-Cu-Mg alloys wasinvestigated by using a TEM, DSC, Vickers macro hardness testerand EPMA. A series of composite specimens were solution treatedat 773 K for l0h, and subsequently aged at 433 K and 473 K for10 mm to 10 4 mm. The aging characteristics of the compositeswere compared with those of the unreinforced alloys which werecast and heat treated under identical conditions as the composites.Although the precipitation of composites is accelerated, the overallage-hardening sequence is similar to that of unreinforced alloys. Inthe case of A12 O3/Al-Si-Cu alloy composite, the degree of age-hardening (ΔHV=HV. Max-HV. 5) is higher than that ofunreinforced alloy, because the θ' phase precipitated preferentiallyon the dislocations is more uniformly dispersed in the compositewith higher density of dislocations. On the contrary, in the A12O3/Al-Si-Cu-Mg alloy composite, theλ' phase homogeneouslyprecipitates in the α matrix independent of dislocations. However,the precipitation amount of λ' phase is decreased due to the priorformation of MgAl2 O4 (spinel) at the interface between the A12O3 fiber and matrix alloy. Therefore, the precipitation rate isalmost unchanged and the degree of age-hardening is slightlydecreased by the presence of A12 O3 fiber.
机译：通过使用TEM，DSC，Vickers宏观硬度测试仪EPMA通过使用A12 O 3连续纤维增强Al-Si-Cu和Al-Si-Cu-Mg合金的年龄硬化方法。一系列复合试样是LOH的溶液处理剂773k，随后以433k和473k滴110mm至10 4mm。与在相同条件下处理和热处理的未粘接合金的衰老特性与诸如复合材料的相同条件下处理的衰老特征。虽然加速复合材料的沉淀，但总成分 - 硬化序列类似于未原始的合金。含有A12 O3 / Al-Si-Cu合金复合材料的情况，硬化程度 - 硬化程度（ΔHv= HV.Max-HV.5）高于OFRENFORCECLCED合金，因为θ'相沉淀优先脱位更均匀分散在较高的脱位密度较高的复合物中。相反，在A12O3 / Al-Si-Cu-Mg合金复合材料中，λ“相位均匀地在α基质中呈α基质，与脱位无关。然而，由于A12O3纤维和基质合金之间的界面处的MgAl 2 O 4（Spinel）的优先级，λ'相的沉淀量降低。因此，通过存在A12 O 3纤维，逐渐沉淀出沉淀速率并不变，并且逐渐变硬。

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