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  1. \u5b66\u672f\u5e72\u8d27<\/strong><\/li>\n<\/ol>\n

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    \"\"<\/p>\n

    \u56fe<\/strong>2 <\/strong>\u53d8\u5f62\u673a\u7406\uff1b<\/strong>a, TiZrHfNb<\/strong>\u57fa<\/strong>HEA<\/strong>\u5728<\/strong>8%<\/strong>\u62c9\u4f38\u5e94\u53d8\u4e0b\u7684<\/strong>STEM<\/strong>\u56fe\u50cf<\/strong>(<\/strong>\u9ec4\u8272\u7bad\u5934\u8868\u793a\u5171\u9762\u4f4d\u9519\u9635\u5217<\/strong>)<\/strong>\uff1b<\/strong>b, 8%<\/strong>\u62c9\u4f38\u5e94\u53d8\u4e0b<\/strong>O-2 HEA<\/strong>\u7684<\/strong>STEM<\/strong>\u56fe\u50cf<\/strong>(<\/strong>\u7ea2\u8272\u7bad\u5934\u8868\u793a\u5076\u6781\u58c1<\/strong>)<\/strong>\u3002<\/strong>c, 8%<\/strong>\u62c9\u4f38\u5e94\u53d8\u4e0b<\/strong>N-2 HEA<\/strong>\u7684<\/strong>STEM<\/strong>\u56fe\u50cf<\/strong>(<\/strong>\u9ec4\u8272\u7bad\u5934\u8868\u793a\u5e73\u9762\u6ed1\u79fb\u5e26<\/strong>)<\/strong>\u3002\u5728\u57fa\u4f53<\/strong>HEA<\/strong>\u548c\u6c2e\u63ba\u6742<\/strong>N-2 HEA<\/strong>\u4e2d\u89c2\u5bdf\u5230\u5178\u578b\u7684\u5e73\u9762\u6ed1\u79fb\u3002\u800c\u63ba\u6742\u6c27\u7684\u53d8\u4f53<\/strong>O-2 HEA<\/strong>\u7684\u53d8\u5f62\u4ee5\u6ce2\u6ed1\u4e3a\u4e3b\uff0c\u8868\u660e\u6c27\u7684\u52a0\u5165\u5bfc\u81f4\u4e86\u4ee5\u6ce2\u6ed1\u4e3a\u4e3b\u7684\u5851\u6027\u53d8\u5f62\u6a21\u5f0f\u3002<\/strong>a<\/strong>\u548c<\/strong>c<\/strong>\u7684\u6676\u5e26\u8f74\u4e3a<\/strong>[011]<\/strong>\uff0c<\/strong>b<\/strong>\u7684\u6676\u5e26\u8f74\u4e3a\u4e3a<\/strong>[001]<\/strong>\u3002<\/strong>d<\/strong>\uff0c\u539f\u4f4d<\/strong>TEM<\/strong>\u62c9\u4f38\u5b9e\u9a8c\u4e2d<\/strong>TiZrHfNb<\/strong>\u57fa<\/strong>HEA<\/strong>\u548c\u95f4\u9699\u63ba\u6742\u53d8\u4f53<\/strong>O-2<\/strong>\u548c<\/strong>N-2 HEAs<\/strong>\u7684\u4f4d\u9519\u95f4\u8ddd\u3002\u767d\u8272\u7bad\u5934\u8868\u793a\u4f4d\u9519\u95f4\u8ddd\u3002<\/strong>O-2 HEA<\/strong>\u7684\u5e73\u5747\u4f4d\u9519\u95f4\u8ddd<\/strong>(25.06 3.15 nm)<\/strong>\u8fdc\u5c0f\u4e8e\u57fa\u5e95<\/strong>HEA (90.36 14.32 nm)<\/strong>\u548c<\/strong>N-2 HEA (104.06 8.14 nm)<\/strong>\u3002\u8bef\u5dee\u6761\u662f\u5747\u503c\u7684\u6807\u51c6\u5dee<\/strong>[3]<\/strong>\u3002<\/strong><\/p>\n

    (3) \u4e00\u79cd\u5236\u5907\u5927\u5757\u9ad8\u5f3a\u9ad8\u5851\u7684\u8d85\u7ec6\u6676\u94a2<\/p>\n

    \u4e9a\u5fae\u7c73\u6676\u7c92\u5c3a\u5bf8\u7684\u94a2\u901a\u5e38\u5177\u6709\u9ad8\u7684\u97e7\u6027\u548c\u5f3a\u5ea6\uff0c\u8fd9\u4f7f\u5b83\u4eec\u5728\u8f7b\u91cf\u5316\u6280\u672f\u548c\u8282\u80fd\u7b56\u7565\u65b9\u9762\u6709\u524d\u666f\u3002\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u8d85\u7ec6\u6676\u7c92(UFG)\u5408\u91d1\u7684\u5de5\u4e1a\u5236\u9020\uff0c\u901a\u5e38\u4f9d\u8d56\u4e8e\u63a7\u5236\u6269\u6563\u76f8\u53d8\uff0c\u4e00\u76f4\u5c40\u9650\u4e8e\u5965\u6c0f\u4f53-\u94c1\u7d20\u4f53\u76f8\u53d8\u94a2\u3002\u6b64\u5916\uff0cUFG\u94a2\u7684\u52a0\u5de5\u786c\u5316\u6709\u9650\uff0c\u4f38\u957f\u7387\u4e0d\u5747\u5300\uff0c\u963b\u788d\u4e86\u5176\u5e7f\u6cdb\u5e94\u7528\u3002\u672c\u5de5\u4f5c\u5728\u5178\u578b\u7684Fe 22Mn0.6C\u5b6a\u751f\u8bf1\u5bfc\u5851\u6027\u94a2\u4e2d\u6210\u529f\u5730\u6279\u91cf\u751f\u4ea7\u51faUFG\u7ed3\u6784\u94a2\uff0c\u4e3b\u8981\u91c7\u7528\u7684\u7b56\u7565\u662f\u5c11\u91cfCu\u5408\u91d1\u5316+\u64cd\u7eb5\u518d\u7ed3\u6676\u8fc7\u7a0b(\u572830\u79d2\u5185)+\u5229\u7528\u5171\u683c\u65e0\u5e8f\u5bccCu\u76f8\u7684\u6676\u5185\u7eb3\u7c73\u6c89\u6dc0\u3002\u5feb\u901f\u800c\u4e30\u5bcc\u7684\u7eb3\u7c73\u6c89\u6dc0\u4e0d\u4ec5\u963b\u6b62\u4e86\u65b0\u4e9a\u5fae\u7c73\u7ea7\u518d\u7ed3\u6676\u6676\u7c92\u7684\u751f\u957f\uff0c\u800c\u4e14\u901a\u8fc7\u9f50\u7eb3\u9489\u624e\u673a\u5236\u63d0\u9ad8\u4e86\u83b7\u5f97\u7684UFG\u7ed3\u6784\u7684\u70ed\u7a33\u5b9a\u6027\u3002\u6b64\u5916\uff0c\u7531\u4e8e\u5176\u5b8c\u5168\u5171\u683c\u6027\u548c\u65e0\u5e8f\u6027\uff0c\u6790\u51fa\u76f8\u5728\u52a0\u8f7d\u4e0b\u4e0e\u4f4d\u9519\u8868\u73b0\u51fa\u5fae\u5f31\u7684\u76f8\u4e92\u4f5c\u7528\u3002\u8fd9\u79cd\u65b9\u6cd5\u80fd\u591f\u5236\u5907\u6676\u7c92\u5c3a\u5bf8\u4e3a800\u00b1400\u7eb3\u7c73\u7684\u5b8c\u5168\u518d\u7ed3\u6676UFG\u7ed3\u6784\uff0c\u800c\u4e0d\u4f1a\u5f15\u5165\u8106\u6027\u9897\u7c92\u548c\u5206\u79bb\u8fb9\u754c\u7b49\u6709\u5bb3\u6676\u683c\u7f3a\u9677\u3002\u4e0e\u672a\u6dfb\u52a0\u94dc\u7684\u94a2\u76f8\u6bd4\uff0cUFG\u7ed3\u6784\u7684\u5c48\u670d\u5f3a\u5ea6\u63d0\u9ad8\u4e86\u4e00\u500d\uff0c\u7ea6\u4e3a710MPa\uff0c\u5747\u5300\u5ef6\u5c55\u6027\u4e3a45%\uff0c\u6297\u62c9\u5f3a\u5ea6\u7ea6\u4e3a2000MPa\u3002\u8fd9\u79cd\u6676\u7c92\u7ec6\u5316\u7684\u6982\u5ff5\u5e94\u8be5\u53ef\u4ee5\u6269\u5c55\u5230\u5176\u4ed6\u5408\u91d1\u7cfb\u7edf\uff0c\u5236\u9020\u5de5\u827a\u53ef\u4ee5\u5f88\u5bb9\u6613\u5730\u5e94\u7528\u4e8e\u73b0\u6709\u7684\u5de5\u4e1a\u751f\u4ea7\u7ebf\u3002<\/p>\n

    \"\"<\/p>\n

    \u56fe<\/strong>3 4Cu<\/strong>\u5728<\/strong>760<\/strong>\u2103\u9000\u706b<\/strong>5min<\/strong>\u540e\u7684\u663e\u5fae\u7ec4\u7ec7\u8868\u5f81\uff1b<\/strong>a,<\/strong>\u540c\u6b65\u8f90\u5c04\u9ad8\u80fd<\/strong>XRD<\/strong>\u8c31\u56fe\uff1b<\/strong>b<\/strong>\uff0c<\/strong>EBSD<\/strong>\u56fe\u663e\u793a\u4e86\u5177\u6709\u8d85\u7ec6\u7ed3\u6784\u7684\u5355\u4e00<\/strong>fcc<\/strong>\u76f8\u3002<\/strong>a<\/strong>\u4e2d\u7684\u63d2\u56fe\u663e\u793a\u4e86\u7c92\u5ea6\u5206\u5e03\u3002<\/strong>c, ADF-STEM<\/strong>\u56fe\u50cf\u663e\u793a\u9ad8\u5bc6\u5ea6\u7684\u9897\u7c92\u5185\u7eb3\u7c73\u6c89\u6dc0\u7269<\/strong>(<\/strong>\u660e\u4eae\u7684\u9897\u7c92<\/strong>)<\/strong>\u3002\u63d2\u56fe\u662f\u6807\u8bb0\u533a\u57df\u7684<\/strong>STEM EDS-SI<\/strong>\u56fe\u50cf\u3002<\/strong>d<\/strong>\uff0c\u539f\u5b50\u5206\u8fa8\u7387<\/strong>ADF-STEM<\/strong>\u56fe\u50cf\u663e\u793a\u4e86\u5bcc\u94dc\u7eb3\u7c73\u6c89\u6dc0\u7269\u7684\u5b8c\u5168\u5171\u683c\u65e0\u5e8f\u6027\u3002<\/strong>e<\/strong>\uff0c\u900f\u5c04\u7535\u955c<\/strong>(<\/strong>\u5de6<\/strong>)<\/strong>\u548c<\/strong>APT(<\/strong>\u53f3<\/strong>)<\/strong>\u901a\u8fc7\u4e24\u4e2a\u6676\u754c<\/strong>(GB)<\/strong>\u7684\u5206\u6790\u663e\u793a\u5bcc\u94dc\u7eb3\u7c73\u6c89\u6dc0\u7269\u7684\u5927\u5c0f\u3001\u5f62\u6001\u548c\u7a7a\u95f4\u5206\u5e03\u3002<\/strong>f<\/strong>\uff0c\u8ddd\u79bb\u76f4\u65b9\u56fe\uff0c\u663e\u793a\u4e86\u4e00\u4e2a\u7eb3\u7c73\u6c89\u6dc0\u7269\u7684\u6210\u5206\u53d8\u5316<\/strong>(e<\/strong>\u4e2d\u7684\u7eff\u8272\u65b9\u5757\u6807\u8bb0<\/strong>)<\/strong>\u3002<\/strong>g, e<\/strong>\u4e2d\u7684\u5706\u67f1\u5f62\u533a\u57df\u7684\u4e00\u7ef4\u6d53\u5ea6\u5256\u9762\uff0c\u5728\u6676\u754c\u5904\u6ca1\u6709\u660e\u663e\u7684\u5143\u7d20\u504f\u6790<\/strong>[4]<\/strong>\u3002<\/strong><\/p>\n

    (4) \u8d85\u5f3a\u94a2\u4e2d\u7eb3\u7c73\u5171\u683c\u7c92\u5b50\u4ecb\u5bfc\u7684\u5e94\u53d8\u786c\u5316<\/p>\n

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    \"\"<\/p>\n

    \u56fe<\/strong>4 ECCI<\/strong>\u548c<\/strong>STEM<\/strong>\u5206\u6790\u8868\u660e\uff0c\u65f6\u6548\u540e<\/strong>3Al<\/strong>\u94a2\u7684\u7a7a\u95f4\u5e26\u7ec4\u7ec7\u5e94\u53d8\u4e3a<\/strong>4%<\/strong>\uff1b<\/strong>(a)<\/strong>\u9ad8\u500d<\/strong>ECCI<\/strong>\u56fe\u50cf\uff0c\u68c0\u6d4b\u5230\u591a\u4e2a\u4e0d\u540c\u5e26\u5bbd\u7684\u5e73\u9762\u6ed1\u79fb\u5e26\uff1b<\/strong>(b)<\/strong>\uff0c<\/strong> (c)<\/strong>\u5178\u578b\u7684<\/strong>BF(<\/strong>\u4eae\u573a<\/strong>)<\/strong>\u56fe\u50cf\u548c\u5bf9\u5e94\u7684<\/strong>HAADFSTEM<\/strong>\u56fe\u50cf\uff0c\u5206\u522b\u663e\u793a\u51fa\u9891\u7e41\u7684\u4f4d\u9519\u76f8\u4ea4\u548c\u9ad8\u5bc6\u5ea6\u6790\u51fa\u76f8\u7684\u4fdd\u7559\u3002<\/strong>(d)<\/strong>\u9ad8\u5206\u8fa8\u7387<\/strong>HAADF STEM<\/strong>\u56fe\u50cf\uff0c\u663e\u793a\u6062\u590d\u7684\u4f4d\u9519\u9644\u8fd1\u6790\u51fa\u7269\u7684\u5468\u671f\u6027\u539f\u5b50\u67f1\u7ed3\u6784\uff0c\u7528\u692d\u5706\u7a81\u51fa\u663e\u793a\u3002\u63d2\u56fe\u662f\u4f4e\u500d<\/strong>STEM<\/strong>\u56fe\u50cf\uff0c\u663e\u793a\u4e86\u6790\u51fa\u76f8\u7684\u4f4d\u7f6e\u3002<\/strong>\u00a0(e)<\/strong>\u56fe\u4e2d\u7bad\u5934\u6240\u793a\u533a\u57df\u7684<\/strong>IFFT<\/strong>\u6a21\u5f0f\uff0c\u663e\u793a\u4e86\u4e0d\u540c\u7c7b\u578b\u7684\u4f4d\u9519<\/strong>[5]<\/strong>\u3002<\/strong><\/p>\n

    (5) \u53d1\u660e\u6297\u8f90\u7167\u65b0\u673a\u5236\uff0c\u5177\u6709\u6781\u5f3a\u7684\u5de5\u7a0b\u5e94\u7528<\/p>\n

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    \"\"<\/p>\n

    \u56fe<\/strong>5 <\/strong>\u79bb\u5b50\u8f90\u7167\u4e0b\u8d85\u6676\u683c\u94a2\u7684\u7ec4\u7ec7\u6f14\u53d8\uff1b<\/strong>a,b<\/strong>\uff0c\u8d85\u6676\u683c\u94a2\u5728<\/strong>500<\/strong>\u2103<\/strong>0 dpa (a)<\/strong>\u548c<\/strong>840 dpa (b)<\/strong>\u4e0b\u7684<\/strong>HAADF-STEM<\/strong>\u56fe\u50cf\uff1b<\/strong>c,d<\/strong>\uff0c\u9ad8\u5206\u8fa8\u7387<\/strong>HAADF-STEM<\/strong>\u56fe\u50cf\u663e\u793a\u4e86<\/strong>NPs<\/strong>\u548c\u5bcc\u6eb6\u8d28\u533a\u57df\u4e4b\u95f4\u7684\u539f\u5b50\u7ed3\u6784\u5dee\u5f02\uff1b<\/strong>e, APT<\/strong>\u8868\u5f81\u7684<\/strong>NPs<\/strong>\u5728\u79bb\u5b50\u8f90\u7167\u8fc7\u7a0b\u4e2d\u7684\u6f14\u5316\uff0c\u4e3b\u8981\u901a\u8fc7<\/strong>50at%Al<\/strong>\u548c<\/strong>Ni<\/strong>\u7b49\u6d53\u5ea6\u8868\u9762\u663e\u793a\u548c\u5f3a\u8c03\uff1b<\/strong>f,g<\/strong>\uff0c\u8ddd\u79bb\u76f4\u65b9\u56fe\u663e\u793a\u4e86\u6240\u9009\u6c89\u6dc0<\/strong>(f)<\/strong>\u548c\u6eb6\u8d28\u5bcc\u96c6\u533a\u57df<\/strong>(g)<\/strong>\u7684\u6210\u5206\u8f6e\u5ed3\uff0c\u5176\u4e2d\u8bef\u5dee\u6761\u662f\u5747\u503c\u7684\u6807\u51c6\u504f\u5dee\uff1b<\/strong>h, HAADF-STEM<\/strong>\u56fe\u50cf\u663e\u793a\u4e86<\/strong>500\u00b0C\/840 dpa<\/strong>\u8f90\u7167\u540e\u4f4d\u9519\u73af\u7684\u5b58\u5728\uff1b<\/strong>i<\/strong>\uff0c\u9ad8\u5206\u8fa8\u7387<\/strong>HAADF-STEM<\/strong>\u56fe\u50cf\uff0c\u663e\u793a\u4f4d\u9519\u73af\u9644\u8fd1\u5b58\u5728<\/strong>NPs<\/strong>\uff0c\u4ee5\u53ca\u76f8\u5e94\u7684<\/strong>FFT<\/strong>\u7ed3\u679c<\/strong>(<\/strong>\u53f3\u84dd\u7ea2\u6846<\/strong>)<\/strong>\uff1b<\/strong>j, HAADF<\/strong>\u56fe\u50cf\u663e\u793a\u4e00\u4e2a<\/strong>\u201c<\/strong>\u6108\u5408<\/strong>\u201d<\/strong>\u7684<\/strong>a\/2<100><\/strong>\u4f4d\u9519\u73af\u8fdc\u79bb\u6790\u51fa\u7269\uff1b<\/strong>k,l<\/strong>\uff0c\u5bf9\u5e94<\/strong>Ni (k)<\/strong>\u548c<\/strong>Al (l)<\/strong>\u7684<\/strong>EDS<\/strong>\u9762\u626b<\/strong>[6]<\/strong>\u3002<\/strong><\/p>\n

     <\/p>\n

      \n
    1. \u6210\u679c\u542f\u8fea<\/strong><\/li>\n<\/ol>\n

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

      [1] Yanwen Zhang. Reassembled nanoprecipitates resisting radiation. News & views, Nature Materials.<\/p>\n

      [2] Suihe Jiang, Hui Wang, Yuan Wu et al. Ultrastrong steel via minimal lattice misfit and high-density nanoprecipitation. Nature.<\/p>\n

      [3] Zhifeng Lei, Xiongjun Liu, Yuan Wu et al. Enhanced strength and ductility in a high-entropy alloy via ordered oxygen complexes. Nature.<\/p>\n

      [4] Junheng Gao, Suihe Jiang, Huairuo Zhang et al. Facile route to bulk ultrafine-grain steels for high strength and ductility. Nature.<\/p>\n

      [5] S.H. Jiang, X.Q. Xu, W. Li et al. Strain hardening mediated by coherent nanoprecipitates in ultrahigh-strength steels. Acta Mater.<\/p>\n

      [6] Jinlong Du, Suihe Jiang, Peipei Cao et al. Superior radiation tolerance via reversible disordering\u2013ordering transition of coherent superlattices. Nature Mater.<\/p>\n","protected":false},"excerpt":{"rendered":"

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