Producing High-Strength Metals by I-ECAP
Producing High-Strength Metals by I-ECAP
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通过 I-ECAP 生产高强度金属
DOI：
10.1002/adem.201500363
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发表时间：
2015
影响因子：
3.6
通讯作者：
Gzyl M
中科院分区：
文献类型：
--
作者：
Gzyl M
采用增量式等通道转角挤压(I-ECAP)技术生产超细晶(UFG)纯铁、5083铝合金、工业纯钛(4级)和AZ31B镁合金。纯铁在室温下加工，铝合金在200 °C下加工，钛在320 °C下加工，镁合金在150 °C下加工。据报道，所有加工材料的强度都得到了提高，这归功于低于1 μm的晶粒细化。在纯铁中，屈服强度的提高最为明显，一次等径流挤压后屈服强度达到近500 Mpa，而锻态时为180 Mpa。本研究获得的超细钛、铝和镁合金的屈服应力分别为800Mpa、350Mpa和300Mpa，与采用锻造和轧制等传统金属成形工艺加工的合金相比，每种情况下的屈服强度都至少提高了30%。
Incremental equal channel angular pressing (I‐ECAP) is used in this work to produce ultrafine‐grained (UFG) pure iron, aluminum alloy 5083, commercial purity titanium (grade 4), and magnesium alloy AZ31B. Pure iron is processed at room temperature, aluminum alloy at 200 °C, titanium at 320 °C, and magnesium alloy at 150 °C. Strength improvement, attributed to the grain refinement below 1 μm, is reported for all processed materials. The yield strength increase is the most apparent in pure iron, reaching almost 500 MPa after one pass of I‐ECAP, comparing to 180 MPa in the as‐forged conditions. UFG titanium, aluminum, and magnesium alloys obtained in this study reached yield stress of 800, 350, and 300 MPa, respectively, in each case exhibiting the yield strength increase by at least 30%, comparing to the alloys processed by conventional metal forming operations such as forging and rolling.