Mg–Al–Ca合金のクリープ強度に及ぼすラーベス相の影響

IF 0.5 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING
You Yamashita, Yoshihiro Terada
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引用次数: 0

Abstract

The effect of Laves phases, C36–(Mg,Al)2Ca and C15–Al2Ca, on high-temperature creep strength was quantitatively investigated for the Mg–5.0Al–1.5Ca alloy produced by die-casting. The homogenization treatment at 750 K for 1 h was carried out to divorce the interconnected skeleton of C36 phase, and the aging treatment at 523 K for 1–1000 h was performed to precipitate the C15 phase within the α-Mg grains. The creep tests to evaluate the creep strength were conducted at 447 K and 70 MPa. When the C36 skeleton is divorced, the minimum creep rate dramatically increases by a factor of 330. The coarsening of the C15 phase within the α-Mg grains increases the creep rate by a factor of 2.6. It was identified that the creep strength of the Mg–5.0Al–1.5Ca alloy is predominantly ascribed to the interconnected skeleton of C36 phase rather than the precipitation strengthening of C15 phase.
拉贝斯相对Mg - Al - Ca合金蠕变强度的影响
定量研究了Laves相C36 - (Mg,Al)2Ca和C15-Al2Ca对压铸Mg - 5.0Al - 1.5 ca合金高温蠕变强度的影响。750 K、1 h的均质处理使C36相骨架分离,523 K、1 ~ 1000 h的时效处理使C15相在α-Mg晶粒内析出。在447 K和70 MPa条件下进行了蠕变强度评价试验。当C36骨架分离时,最小蠕变率显著增加330倍。α-Mg晶粒内C15相的粗化使蠕变速率提高了2.6倍。结果表明,Mg-5.0Al-1.5Ca合金的蠕变强度主要来自于C36相骨架的互联,而不是C15相的析出强化。
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来源期刊
Journal of The Japan Institute of Metals
Journal of The Japan Institute of Metals 工程技术-冶金工程
CiteScore
0.70
自引率
0.00%
发文量
27
审稿时长
6-12 weeks
期刊介绍: Information not localized
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