本研究主要針對沃斯田鐵不?袗?，在高能量電子束下與一般電弧銲接下之織構分析，由於高能量電子束其冷卻速率比一般銲接來得快，而其在金相的表現上，比一般電弧銲接在銲道中央保有沃斯田鐵相較多，並藉由背向電子繞射系統(EBSD)作分析，從織構的分析上，電子束所呈現的織構組成較一般電弧銲所成織構複雜，即呈任意方向(random)，而電弧銲則較趨於立方織構{100}<001>，及黃銅織構{110}<1-1 2>，在電子束方面，可從銲冠，銲根去區別，銲冠較偏立方織構、迴轉立方織構及高斯織構，而銲根則較偏黃銅織構及高斯織構。
本實驗也針對銲道之低溫韌性作實驗，一般而言，銲道的低溫韌性比母材來得低，且在電子束接近銲冠部分比接近銲根部分，在SEM下所觀察到脆性破壞(cleavage)機會較大，而當母材晶粒長得足夠大時，在銲道低溫破裂所呈現的韌窩(dimples)也較淺，所以本實驗也由破斷面的觀察及衝擊值分析，從中並與織構作比較，發現銅織構與高斯織構對低溫抗脆性有助益。並在硬度試驗中得到同樣的證實。
而沃斯田鐵不?袗?中，δ肥粒鐵相的成長方向，也藉由雙相解析得到證實，δ肥粒鐵相均會沿近高斯織構發長。而由銲道肥粒鐵含量分析，電子束與氬銲在銲道中心及近熱溶線有較多的肥粒鐵相，尤其氬銲較顯著。

The austenite stainless in high energy welding and tradition welding (TIG) produce different texture revolution and mechanicl property are main
research.
From EBSD analysis,austenite stainless in EBW,make more random texture to TIG welding,and
main texture in TIG welding are cubic texture {100}<001> and copper texture {110}<1-1 2>.From
EBW,there are some different texture in up fusion
zone and down fusion zone .Experience of impact and hardness ,which find out copper and brass texture have more mechanical property for low-temperature, δ ferrite content in center welding fusion and boundary fusion zone have different percent, then that can explain how differnt hardness value in center and fusion boundary about mechanical property.

壹、 前言 .1
1.1研究背景………………………………………………………..1
1.2研究動機………………………………………………………..2
貳、 文獻回顧…………………………………………...3
2.1沃斯田鐵不?袗?銲接特性 ...3
2.2電子束銲接 ..7
2.3氣體鎢極電弧銲接法 ...9
2.4背向散色電子繞射法 .10
2.5 EBSD在不?袗?電子束銲接銲道分析上的應用 .12
2.6顯微織構與破壞關係 .13
2.7立方金屬材料的織構演化 .13
2.8破壞模式 .14
2.9脆性破壞 .15

參、 實驗步驟…………………………………………..17
3.1實驗材料及試片處理 17
3.2銲接 17
3.3金相實驗 18
3.4掃瞄式電子顯微鏡( SEM)觀察 18
3.5背向散射電子繞射( EBSD)系統觀察 18
3.6衝擊實驗 19
3.7硬度試驗 19
3.8實驗流程圖 20肆、結果與討論………………………………………21
4.1母材金相組織 21
4.2銲道的金相組織……………………………………………....21
4.3低溫衝擊試驗…………………………………………………22
4.4衝擊破斷面之觀察……………………………………………23
4.5EBSD顯微織構分析…………………………………………..24
4.5.1母材織構分析……………………………………………….24
4.5.2電子束銲道織構分析……………………………………….25
4.5.3氣體鎢極電弧銲接織構分析………………….……………27
4.6衝擊值與顯微織構之對照……………………………………28
4-7銲道之γ沃斯田鐵與δ肥粒鐵之織構影響…………………28
4-8電子束與氬銲在γ沃斯田鐵、δ肥粒鐵織構分析…………28
4-9硬度試驗………………………………………………………29

伍、結論……………………………………………….31
陸、參考文獻………………………………………….32
表……………………………………………………….35
圖……………………………………………………….37

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