灰口铸铁的耐磨性及加工硬化能力最差。
接头的应变硬化能力增强，拉伸断口呈现出微孔聚合型断裂特征。
Meanwhile, strain hardening capacity of FSW joint in cooling water also enhances, and the tensile fracture presents the characteristic of microporous polymeric fracture.
D P钢拥有更加优良的加工硬化能力，TRIP钢则具有较为理想的烘烤硬化能力。
DP steel has better work hardening ability while TRIP steel has better bake hardening ability.
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