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Griffith proposed that cracking is not a ¡°reversible¡± operation, but the very small crack may be healed if the maximum temperature of the heat-treatment is sufficient to bring the atoms on either side of the crack to within a mutual range bythermal agitation. ¡¾·Òë¡¿Griffith Ìá³öÁÑÎÆ²»ÊÇÒ»¸ö¡°¿ÉÄæ¡±²Ù×÷£¬µ«ÈôÈÈ´¦ÀíµÄ×î´óζÈÓÉÓÚ±»ÈÈÈŶ¯×ãÒÔ½«ÁÑÎÆÒ»±ßµÄÔ×Ó´øµ½Ï໥£¨×÷Óã©·¶Î§ÄÚ£¬·Ç³£Ð¡µÄÁÑÎÆ¿ÉÄÜÓúºÏ¡£ |
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2Â¥2015-01-12 23:03:42
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3Â¥2015-01-14 13:26:39














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