{"id":179902,"date":"2019-07-09T11:59:08","date_gmt":"2019-07-09T03:59:08","guid":{"rendered":"\/\/m.iemloyee.com\/?p=179902"},"modified":"2019-07-10T23:10:25","modified_gmt":"2019-07-10T15:10:25","slug":"%e9%87%91%e5%b1%9e%e6%9d%90%e6%96%99%e5%8f%91naturescience%e7%ad%89%e9%a1%b6%e5%88%8a%ef%bc%9a%e5%8d%a2%e6%9f%af%e3%80%81%e5%8d%95%e6%99%ba%e4%bc%9f%e7%ad%89%e5%8f%91%e7%8e%b0%e7%9a%84%e6%9e%81","status":"publish","type":"post","link":"\/\/m.iemloyee.com\/?p=179902","title":{"rendered":"\u91d1\u5c5e\u6750\u6599\u53d1Nature&science\u7b49\u9876\u520a\uff1a\u5362\u67ef\u3001\u5355\u667a\u4f1f\u7b49\u53d1\u73b0\u7684\u6781\u5927\u63d0\u5347\u529b\u6027\u7684\u201c\u8d85\u7ea7\u201d\u673a\u5236"},"content":{"rendered":"

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1.\u5229\u7528\u4f4d\u9519\u548c\u5b6a\u6676\u5728\u5fae\u89c2\u5c3a\u5ea6\u8c03\u63a7\u6750\u6599\u529b\u6027<\/b><\/strong><\/p>\n

1\uff09\u5357\u4eac\u7406\u5de5\u5927\u5b66\u9648\u5149\u6559\u6388\u53d1\u73b0PST TiAl\u5355\u6676\u5728\u5851\u6027\u53d8\u5f62\u8fc7\u7a0b\u4e2d\u5f62\u6210\u7eb3\u7c73\u5b6a\u6676\uff0c\u662f\u5176\u62e5\u6709\u8d85\u9ad8\u5f3a\u5851\u6027\u7684\u6839\u672c\u539f\u56e0\u3002<\/p>\n

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Figure1 PST TiAl\u5355\u6676\u62c9\u4f38\u540e\u5728\u900f\u5c04\u7535\u955c\u4e0b\u7684\u5fae\u89c2\u7ec4\u7ec7\uff0c\u53ef\u4ee5\u770b\u51fa\u53d8\u5f62\u540e\u5b6a\u6676\u548c\u4f4d\u9519\u540c\u65f6\u51fa\u73b0[1]<\/sup>\u3002<\/p>\n

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Figure 2 \u7eb3\u7c73\u5b6a\u6676\u94dc\u7684\u53d8\u578b\u7279\u5f81\uff1aa.b\u6676\u7c92G1\u4e2d\u8ff7\u4f60\u7684\u53d8\u5f62\u65b9\u5f0f;c.d \u5206\u522b\u4e3a\u5bf9\u7eb3\u7c73\u94dc\u8fdb\u884c\u626b\u63cf\u548c\u5171\u805a\u7126\u6fc0\u5149\u626b\u63cf\u663e\u5fae\u955c\u89c2\u5bdf\u7684\u7ec4\u7ec7\u5f62\u6001[2]<\/sup>\u3002<\/p>\n

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Figure 3 \u4e3a\u5229\u7528\u900f\u5c04\u7535\u955c\u89c2\u5bdf\u5230\u7684\u9879\u94fe\u72b6\u4f4d\u9519\u5f97\u7ec4\u6001\uff0c\u53ef\u4ee5\u770b\u5230\u76f8\u4e92\u5e73\u884c\u7684\u4f4d\u9519\u4f4d\u4e8e\u4e91\u7eb9\u4e0a\uff0c\u4e0e\u539f\u5b50\u6a21\u62df\u7684\u7ed3\u679c\u4e00\u81f4\uff0c\u540c\u65f6\u53ef\u4ee5\u770b\u5230\u4f4d\u9519\u7684Burgers\u77e2\u91cf\"\"\u4e0e\u5b6a\u6676\u77e2\u91cf\u5e73\u884c\"\"\u3002<\/p>\n

Figure 3 \u53d8\u5f62\u7eb3\u7c73\u94dc\u4e2d\u201c\u9879\u94fe\u72b6\u201d\u4f4d\u9519\u7684\u5f62\u8c8c[2]<\/sup><\/p>\n

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Figure 4 D&P\u94a2\u62c9\u4f38\u8bd5\u9a8c\u540e\u7684\u5fae\u89c2\u7ec4\u7ec7\uff1a<\/p>\n

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A \u62c9\u957f\u7684\u4f4d\u9519\u80de\u7ed3\u6784\uff1bB \u4e0d\u540c\u5e94\u53d8\u4e0bXRD\u7684\u884d\u5c04\u56fe\u8c31\uff1bC \u6750\u6599\u65ad\u88c2\u540e\u5728\u7c97\u5927\u7684\u5965\u6c0f\u4f53\u6676\u7c92\u4e2d\u5f62\u6210\u9488\u72b6\u9a6c\u6c0f\u4f53\uff1bD \u6750\u6599\u53d8\u5f62\u65ad\u88c2\u540e\u5728\u4e9a\u5fae\u7c73\u5965\u6c0f\u4f53\u4e2d\u5f62\u6210\u7684\u5b6a\u6676[3]<\/sup>\u3002<\/p>\n

4\uff09\u897f\u5b89\u4ea4\u5927\u5355\u667a\u4f1f\u7b49\u4eba\u901a\u8fc7\u9525\u9762<c+a>\u6ed1\u79fb\u8c03\u8282\u9541\u5408\u91d1\u7684\u5851\u6027<\/p>\n

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Figure 5 \u5229\u7528\u539f\u4f4d\u900f\u5c04\u5728\u4e0d\u540c\u6837\u54c1\u4e2d\u89c2\u6d4b\u5230\u7684c+a\u6ed1\u79fb[4]<\/sup><\/p>\n

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Figure 6 \u65b0\u578b\u9541\u5408\u91d1\u7684\u53d8\u5f62\u673a\u5236\uff1a<\/p>\n

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3 \u57fa\u4e8e\u754c\u9762\u80fd\u7684\u8c03\u63a7<\/b><\/strong><\/p>\n

1\uff09 \u4e2d\u79d1\u9662\u91d1\u5c5e\u6240\u5362\u67ef\u53d1\u73b0\u6781\u7ec6\u7eb3\u7c73\u6676\u91d1\u5c5e\u4e2d\u7684\u5851\u6027\u53d8\u5f62\u673a\u5236\u53ca\u5176\u786c\u5ea6\u53ef\u901a\u8fc7\u8c03\u8282\u6676\u754c\uff08GB\uff09\u7684\u7a33\u5b9a\u6027\u5b9e\u73b0\u3002<\/p>\n

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Figure 7 Ni\u2013Mo\u6837\u54c1\u7684\u53d8\u5f62\u673a\u7406\uff1a<\/p>\n

\"\"<\/p>\n

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\u53c2\u8003\u6587\u732e\uff1a<\/strong><\/p>\n

[1] Polysynthetic twinned TiAl single crystals for high-temperature applications. Guang Chen, Yingbo Peng, Gong Zheng et al, 20 JUNE 2016 | DOI: 10.1038\/NMAT4677, Nature Materials<\/p>\n

[2] History-independent cyclic response of nanotwinned metals. Qingsong Pan, Haofei Zhou, Qiuhong Lu, Huajian Gao & Lei Lu, Doi:10.1038\/nature24266<\/p>\n

[3] High dislocation density\u2013induced large ductility in deformed and partitioned steels.B.B. He, B. Hu, H. W. Yen, G. J. Cheng, Z. K. Wang, H. W. Luo, M. X. Huang \u00a0Science\uff0c2017\uff0cDOI: 10.1126\/science.aan0177<\/p>\n

[4] Large plasticity in magnesium mediated by pyramidal dislocations. Bo-Yu Liu, Fei Liu, Nan Yang, Xiao-Bo Zhai, Lei Zhang, Yang Yang, Bin Li, Ju Li, Evan Ma, Jian-Feng Nie, Zhi-Wei Shan. Doi:10.1126@science.aaw2843<\/p>\n

[5] Dual-phase nanostructuring as a route to highstrength\u00a0magnesium alloys. \u00a0Ge Wu, Ka-Cheung Chan, Linli Zhu, Ligang Sun & Jian Lu. DOI\uff1a10.1038\/nature21691<\/p>\n

[6] Ultrastrong steel via minimal lattice misfit and high-density nanoprecipitation. Suihe Jiang, Hui Wang, Yuan Wu1 et al .Nature\uff0c2017\uff0cDOI\uff1a10.1038\/nature22032<\/p>\n

[7] Grain boundary stability governs hardening and softening in extremely fine nanograined metals. J.Hu, Y.N.Shi, X. Sauvage, G. Sha, K. Lu. Science\uff0c2017\uff0cDOI:10.1126\/science.aal5166<\/p>\n

[8] Improving sustainability with simpler alloys. Xiuyan Li and K.Lu. Doi:10.1126@science.aaw9905<\/p>\n

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