由于镁晶体为密排六方结构，镁合金的室温塑性加工能力较低，因而很有必要研究镁合金的热拉伸性能，壳形件热拉深成形及其有限元模拟，为今后镁合金塑性加工提供必要技术支持。
So it is necessary to study hot stretch properties, hot drawing of shell parts and its finite element simulation of magnesium alloys for providing technical supports of plastic processing.
它有密排六方晶体结构。
面心立方（FCC）及六方最密（HCP）结构金属中的差排结构将有较详细的描述。
Dislocation structures in FCC and HCP metals are described in some detail.
面心立方（FCC）及六方最密（HCP）结构金属中的差排结构将有较详细的描述。
Dislocation structures in FCC and HCP metals are described in some detail.
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