24小时热门版块排行榜

返回列表

当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖

caiwangtan

金虫 (正式写手)

应助: 36 (小学生)
金币: 1669.2
帖子: 384
在线: 254.3小时
虫号: 888631

[交流] 【求助】镁合金轧制方向

镁合金的轧制方向对力学性能影响大不大？也就是说平行于轧制方向和垂直于轧制方向对焊接后抗拉强度影响大不大？谢谢

回复此楼

» 猜你喜欢

心脉受损已经有3人回复
Bioresource Technology期刊，第一次返修的时候被退回好几次了已经有8人回复
寻求一种能扛住强氧化性腐蚀性的容器密封件已经有7人回复
到新单位后，换了新的研究方向，没有团队，持续积累2区以上论文，能申请到面上吗已经有8人回复
申请2026年博士已经有6人回复
请问哪里可以有青B申请的本子可以借鉴一下。已经有5人回复
2025冷门绝学什么时候出结果已经有7人回复

» 本主题相关价值贴推荐，对您同样有帮助:

» 抢金币啦！回帖就可以得到:
查看全部散金贴

1楼2010-11-15 13:14:16

已阅回复此楼关注TA 给TA发消息送TA红花 TA的回帖

金教授

新虫 (小有名气)

应助: 0 (幼儿园)
金币: 150.6
帖子: 56
在线: 18.3小时
虫号: 1132075

引用回帖:

Originally posted by caiwangtan at 2010-11-15 13:14:16:
镁合金的轧制方向对力学性能影响大不大？也就是说平行于轧制方向和垂直于轧制方向对焊接后抗拉强度影响大不大？谢谢

Magnesium alloys have strong planar anisotropy, e.g., the tensile properties in 0, 45 and 90 deg to RD are very different. This is due to the fact that magnesium alloys usually have h.c.p. structure. Generally speaking, the lower the symmetry of lattice unit, the higher the anisotropy. For example, h.c.p. magnesium has much stronger anisotropy than f.c.c. aluminum. The strong anisotropy in magnesium alloys can be explained by (i) the texture, (ii) slip system and (iii) Schmid factor.

The texture in magnesium sheets is mainly the basal texture {0001}<11-20>. During deformation, there are 4 possible slip systems:

(1) Basal {0001}<11-20>
(2) Prismatic {10-10}<11-20>
(3) Pyramidal {11-22}<11-2-3> + {10-12}<11-20>
(4) Twinning <10-11> on {10-12}

At elevated temperature, it is more complex because grain boundary sliding is involved. When you calculate the Schmid factors at different directions, you will see that tensile at 45 deg to RD is the easiest, and tensile at 0 deg is slightly easier than at 90 deg. Therefore, it is often observed that YS-45 < YS-0 < YS-90 and EL-45 > EL-0 > EL-90. However, it is also dependent on the chemical composition, the temper (as-rolled or fully annealed), the grain size, the forming temperature and many other factors. Sometimes the difference between the 0 deg and 90 deg is not very obvious, and it may also be reverse in some alloys under certain conditions, i.e., YS-0 > YS-90 and EL-0 < EL-90.

[ Last edited by 金教授 on 2010-11-16 at 10:52 ]