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为了开发超高强度铝合金和评估各种强化机制对合金屈服强度的影响,将Al-4%Cu-3%TiB2进行低温轧制,然后再在175°C下快速退火、在125°C下时效。在总伸长率为9%的情况下,Al-4%Cu-3%TiB2原位复合材料得到800 MPa的高强度。使用标准方程来评估固溶强化、晶粒细化、位错强化、弥散强化和析出硬化等各种强化机制的贡献。其中贡献最大的是低温轧制引起的晶粒细化,其次是析出硬化、弥散强化。
In order to develop ultra-high strength aluminum alloys and evaluate the effect of various strengthening mechanisms on the yield strength of the alloy, Al-4% Cu-3% TiB2 was rolled at low temperature followed by rapid annealing at 175 ° C at 125 ° C aging. Al-4% Cu-3% TiB2 in-situ composites achieved a high strength of 800 MPa at a total elongation of 9%. Standard equations were used to evaluate the contribution of various strengthening mechanisms such as solution strengthening, grain refinement, dislocation strengthening, dispersion strengthening and precipitation hardening. The largest contribution is the grain refinement caused by low temperature rolling followed by precipitation hardening and dispersion strengthening.