The defect formation in a rod-shaped AA7003 alloy is carefully treated in the sample extruded at 10 or 20 m min⁻¹ with their structure–property relationships. The <111> + <100> double fibre texture is formed in the extruded rods, but it is altered near the surface of the extrudates due to recrystallisation and recovery, being triggered by the processing heat. This reduces strains at the region, leading to softening of the hardness. Coarse Al₉(Mn,Fe)₂Si compounds are transported to the die throat with the fragmentation. The agglomeration of compounds occurs near the surface and makes pick-up. Eventually the number of pick-up is much higher in the sample extruded at 20 m min⁻¹.

棒状 AA7003 合金中的缺陷形成在以 10 或 20 m min ^-1挤压的样品中经过精心处理，并具有它们的结构-性能关系。<111> + <100> 双纤维织构在挤压棒中形成，但由于再结晶和恢复，它在挤出物表面附近发生改变，由加工热触发。这减少了该区域的应变，导致硬度软化。粗Al ₉ (Mn,Fe) ₂ Si 化合物随着破碎被输送到模具喉部。化合物的团聚发生在表面附近并被吸收。最终，在以 20 m min ^-1挤出的样品中，拾取的数量要高得多。