(2021) Accounting for the Effects of Dislocation Climb Mediated Flow in Mg Alloy ZK10 Sheet. In: Miller V.M., Maier P., Jordon J.B., Neelameggham N.R. (eds) . The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-65528
(2021) Accounting for the Effects of Dislocation Climb Mediated Flow in Mg Alloy ZK10 Sheet. In: Miller V.M., Maier P., Jordon J.B., Neelameggham N.R. (eds) . The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-65528
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(2021) 考虑镁合金 ZK10 板材中位错爬移介导流动的影响。
DOI：
10.1007/978-3-030-65528-0_6
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Agnew, Sean R.
中科院分区：
文献类型：
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作者：
Ritzo, Michael A.;Agnew, Sean R.
对ZK10镁合金薄板的拉伸样品进行了温度和应变速率的测试，测试温度和应变速率设计成相当均匀地探测齐纳-霍洛蒙参数值的范围，从ln(Z)≈15(10-4S−1和623K)到ln(Z)≈50(10-3S−1和300K)。与更常用的镁合金AZ31B板材不同，ZK10板材在45°(R45≈1.2)和TD(RTD≈1.4)样品取向下在低温下都表现出适度的应变各向异性(r值)，尽管有证据表明存在显著的位错棱体滑移和位错，这往往导致低温下的高r值。这些低的r值在高温下变得更低(r45≈0.84和rTD≈0.89)。这些行为被认为是由于不同的初始织构-织构和变形机制活动而发生的，包括在室温和高温下适度的拉伸孪晶和 <；c + a>； 滑移。用粘塑性自洽程序(VPSC)对织构镁合金ZK10薄板的位错攀升行为进行了数值模拟，结果表明，金字塔形 <；c + a>； 位错的滑移和基面 <a> 位错的爬升都是描述高温行为的必要条件。
Tensile samples of an Mg alloy ZK10 sheet were tested at a range of temperatures and strain rates designed to rather evenly probe a range of Zener Hollomon parameter values, from ln(Z) ≈ 15 (10–4s−1and 623 K) up to ln(Z) ≈ 50 (10–3s−1and 300 K). In contrast with more commonly examined Mg alloy AZ31B sheet material, ZK10 sheet material shows modest strain anisotropyAnisotropy (r-value) at low temperatures for both 45° (r45≈ 1.2) and TD (rTD≈ 1.4) sample orientations, despite showing evidence of significant prismatic slip of dislocationsDislocation, which often leads to high r-values at low temperatures. These low r-values become even lower (r45≈ 0.84 and rTD≈ 0.89) at high temperatures. These behaviors are hypothesized to occur due to a distinct initial textureTexture and deformation mechanism activity, which includes a modest level of tensile twinningTwinning and <c + a> slip at both room and elevated temperature. A version of the viscoplastic self-consistent (VPSC) code, which accounts for the kinematics of dislocation climbClimb, is used to simulate the behavior of a textured Mg alloy ZK10 sheet reveals that both the glide of pyramidal <c + a> dislocations and the climb of basal < a > dislocations are required to describe the behavior at elevated temperatures.