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首页> 外文期刊>Journal of geophysical research. Solid earth: JGR >Grain Boundary Sliding in High‐Temperature Deformation of Directionally Solidified hcp Zn Alloys and Implications for the Deformation Mechanism of Earth's Inner Core
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Grain Boundary Sliding in High‐Temperature Deformation of Directionally Solidified hcp Zn Alloys and Implications for the Deformation Mechanism of Earth's Inner Core

机译：晶界在高温变形中滑动定向凝固的HCP Zn合金的影响和地球内核变形机制的影响

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Abstract >Earth's inner core exhibits elastic anisotropy, but the cause of the texturing is uncertain: solidification, deformation, or some combination. In experiments presented here we deformed in torsion directionally solidified Zn‐3 wt pct Sn alloys at 0.97 of the melting temperature of pure Zn. We used a Zn‐rich alloy because Zn is hexagonal close‐packed at atmospheric pressure, as is likely Fe under inner core conditions. The directionally solidified alloys have the textured, columnar dendritic microstructure that has been proposed for the inner core. As a control we deformed in torsion the same alloy at the same temperature, but with a starting microstructure that is comparatively fine‐grained, equiaxed, and untextured. We find evidence that the directionally solidified alloys deform by means of grain boundary sliding, presumably accompanied by diffusion near the ends of the columnar crystals in order to preserve macroscopic shape. We also find that the directionally solidified alloys require approximately 3 times the torque to deform to the same strain than do the untextured alloys. Grain boundary sliding and greater hardness are due to insufficient slip systems to accommodate the strain, as a result of the texturing. This is supported by microcracking in the deformed directionally solidified alloys. Although the inner core is unlikely to exhibit semibrittle deformation, the experiments suggest that a directionally solidified inner core could have a higher viscosity than one with a finer‐grained, untextured microstructure and that grain boundary sliding may be a dominant deformation mechanism, in spite of the large grain size. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“Main”XML：Lang =“en”> <标题类型=“main”>抽象</ title> >地球的内核表现出弹性各向异性，但纹理的原因是不确定的：凝固，变形或者一些组合。在这里介绍的实验中，我们在纯Zn的熔化温度的0.97中扭转定向凝固的Zn-3 Wt PCT Sn合金。我们使用了富含锌的合金，因为Zn是在大气压下的六边形封闭，可能在内核条件下的Fe。定向凝固的合金具有已经提出的内芯所提出的纹理化的柱状树突微观结构。作为一种控制，我们在相同温度下扭转相同的合金，但具有比较细粒，等粗的和未致致细胞的起始微观结构。我们发现证据表明，通过晶界滑动的定向凝固的合金变形，可能伴随着柱状晶体末端附近的扩散，以保持宏观形状。我们还发现定向凝固的合金需要大约3倍的扭矩来变形到与未致伸张的合金相同的应变。由于纹理化，晶界滑动和更大的硬度是由于滑动系统不足以容纳应变。这是通过在变形的方向凝固的合金中进行微裂纹来支持。尽管内芯不太可能表现出半纤细变形，但实验表明，定向凝固的内芯可以具有比具有更精细的未致伸张的微观结构的粘度，并且晶界滑动可能是主要的变形机制，尽管如此大粒度。</ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-34677/'>《Journal of geophysical research. Solid earth: JGR》</a> <b style="margin: 0 2px;">|</b><span>2018年第1期</span><b style="margin: 0 2px;">|</b><span>共15页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Bergman Michael I.&option=202" target="_blank" rel="nofollow">Bergman Michael I.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Yu James&option=202" target="_blank" rel="nofollow">Yu James;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Lewis Daniel J.&option=202" target="_blank" rel="nofollow">Lewis Daniel J.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Parker Grant K.&option=202" target="_blank" rel="nofollow">Parker Grant K.;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Physics DepartmentSimon's Rock CollegeGreat Barrington MA USA;</p> <p>Physics DepartmentSimon's Rock CollegeGreat Barrington MA USA;</p> <p>Materials Research CenterRensselaer Polytechnic InstituteTroy NY USA;</p> <p>Physics DepartmentSimon's Rock CollegeGreat Barrington MA USA;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/163.html" title="地球物理学">地球物理学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=inner core&option=203" rel="nofollow">inner core;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=deformation&option=203" rel="nofollow">deformation;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=solidification&option=203" rel="nofollow">solidification;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=grain boundary sliding&option=203" rel="nofollow">grain boundary sliding;</a> </p> <div class="translation"> 机译：内核;变形;凝固;晶界滑动; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704025592958.html">Grain Boundary Sliding in High‐Temperature Deformation of Directionally Solidified hcp Zn Alloys and Implications for the Deformation Mechanism of Earth's Inner Core</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Bergman Michael I.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Bergman Michael I.,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Yu James&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Yu James,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Lewis Daniel J.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Lewis Daniel J.,</a> <a href="/journal-foreign-34677/" target="_blank" rel="nofollow" class="tuijian_authcolor">Journal of geophysical research. 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href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=林栋梁&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,林栋梁</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=单爱党&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,单爱党</a> <span> <a href="/journal-cn-57289/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 金属学报 </a> </span> <span> . 1996</span><span>,第11期</span> </span> </div> </li> <li> <div> <b>6. </b><a class="enjiyixqcontent" href="/academic-conference-cn_meeting-37692_thesis/020221613564.html">Zn-22％Al锌铝合金超塑性拉伸晶界滑动的研究</a> <b>[C]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=林兆荣&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 林兆荣</a> <span> <a href="/conference-cn-37692/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 1987年中国机械工程学会锻压学会第四届学术年会 </a> <span> <span> . 1987</span> </span> </div> </li> <li> <div> 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PRESSURES</a> <b>[P]</b> . <span> 外国专利： <!-- --> SU667892A1 </span> <span> . 1979-06-15</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：在高温和高压下凝固过程中凝固粘结剂线性变形的测量方法 </span> </p> </li> <li> <div> <b>4. </b><a class="enjiyixqcontent" href="/patent-detail/06130467634981.html">ALLOY STEEL FERRITICO HAVING GOOD RESISTANCE TO OXIDATION AND GOOD RESISTANCE TO DEFORMATION IN HIGH TEMPERATURES, ARTICLE HAVING GOOD RESISTANCE TO OXIDATION AND DEFORMATION FOR USE IN TEMPERATURES UP TO 982 C</a> <b>[P]</b> . <span> 外国专利： <!-- --> BR8804652A </span> <span> . 1989-04-18</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：高温下具有良好的抗氧化性和抗变形性的合金钢铁素体，在高达982 C的温度下使用的制品具有良好的抗氧化性和抗变形性的物体 </span> </p> </li> <li> <div> <b>5. </b><a class="enjiyixqcontent" 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