| 查看: 2048 | 回复: 8 | |||
| 本帖产生 1 个 MM-EPI ，点击这里进行查看 | |||
sayhalo木虫 (小有名气)
|
[交流]
pure Al 拉伸断口图 -龙卷风一样的窝窝 已有5人参与
|
||
|
大家看看，为什么我的 pure Al 拉伸断口图（球磨3h-烧结挤压），然后做拉伸试验，看到很多像龙卷风一样的窝窝，没有见过这么大的韧窝，这算是韧窝吗？ 谢谢 见图  [ Last edited by xucz on 2011-5-2 at 23:29 ] |
回复此楼» 猜你喜欢
极限拉扯，如何抉择
已经有16人回复
-
40+中年人失业后，还能找到好工作吗？
已经有16人回复
-
人工智能虚构史料、伪造文献频现，多家期刊声明抵制
已经有4人回复
-
CsPbI2Br全无机钙钛矿SEM图像异常分析
已经有8人回复
-
用NBS溴化时溶剂除了CCl4外还有什么
已经有9人回复
-
申请科研项目纯靠实力能成功吗？
已经有12人回复
2楼2011-05-02 16:46:19
sayhalo
木虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 2418.3
- 散金: 7
- 红花: 3
- 帖子: 199
- 在线: 57.9小时
- 虫号: 864477
- 注册: 2009-10-07
- 专业: 金属基复合材料
3楼2011-05-03 08:31:15
liangzi0321
金虫 (正式写手)
- 应助: 9 (幼儿园)
- 金币: 725.9
- 散金: 1233
- 红花: 1
- 帖子: 343
- 在线: 107.4小时
- 虫号: 468242
- 注册: 2007-11-27
- 性别: GG
- 专业: 极端条件下使用的金属材料
4楼2011-05-03 09:53:44
neukdq
铁虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 128.1
- 散金: 27
- 帖子: 105
- 在线: 25.1小时
- 虫号: 1076691
- 注册: 2010-08-18
- 性别: GG
- 专业: 金属材料的合金相、相变及
5楼2011-05-03 10:34:32
anin
木虫 (著名写手)
如来的神掌
- 应助: 4 (幼儿园)
- 贵宾: 0.082
- 金币: 2950.2
- 散金: 20
- 红花: 6
- 帖子: 1833
- 在线: 184.6小时
- 虫号: 69399
- 注册: 2005-05-21
- 专业: 金属材料的微观结构
6楼2011-05-03 11:10:19
sayhalo
木虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 2418.3
- 散金: 7
- 红花: 3
- 帖子: 199
- 在线: 57.9小时
- 虫号: 864477
- 注册: 2009-10-07
- 专业: 金属基复合材料
7楼2011-05-03 17:41:56
hui_jun_li
木虫 (正式写手)
- MM-EPI: 3
- 应助: 0 (幼儿园)
- 贵宾: 0.07
- 金币: 1576.2
- 红花: 6
- 帖子: 514
- 在线: 22.1小时
- 虫号: 748650
- 注册: 2009-04-14
- 性别: GG
- 专业: 金属材料, 电镜
★ ★ ★
小木虫(金币+0.5):给个红包，谢谢回帖
imrsfb(金币+2, MM-EPI+1): 谢谢专家的详细解答！ 2011-05-04 08:50:52
小木虫(金币+0.5):给个红包，谢谢回帖
imrsfb(金币+2, MM-EPI+1): 谢谢专家的详细解答！ 2011-05-04 08:50:52
| Large dimple is called "dominant void", part of "microvoid Coalescence or Dimple Fracture" - usually occurs under single load or tearing. This is shown by depressions in the microstructure called dimples, which occur from microvoid emergence in places of high local plastic deformation. Under increased strain micrvoids grow, coalescence, until rupture occurs, thus dimple rupture. Dimple size and shape depends on the type of loading and extent of microvoid emergence. When a material is put under uniaxial tensile loading, equiaxed dimples appear which have complete rims. Under a tear loading the dimples are elongated, the rims of the dimples are not complete and the dimples are in the same direction as the loading. Shear loading has the same features as tear loading except the dimples are in opposite directions. The following sentences provide other common terminology associated with dimple fracture. Oval dimples occur when a large void intersects a smaller subsurface void, the dimples form an oval shape and exhibit complete rims. A serpentine glide is an interwoven pattern of glide plane decohesion steps. Ripples are partially smoothed out areas of serpentine glide. A stretched area is a flat, featureless area resulting from further straining of a ripple pattern. Intergranular dimple rupture occurs along grain boundaries due to nucleation and coalescence of voids at grain boundaries. |
8楼2011-05-03 18:46:40
sayhalo
木虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 2418.3
- 散金: 7
- 红花: 3
- 帖子: 199
- 在线: 57.9小时
- 虫号: 864477
- 注册: 2009-10-07
- 专业: 金属基复合材料
9楼2011-05-03 19:37:37