[1]DANG Ning,等.In-situ SEM and EBSD Analysis on Plastic Behavior of Laser Beam Welding Ti-6Al-4V Alloy[J].中國(guó)材料進(jìn)展,2019,(03):279-285.[doi:10.7502/j.issn.1674-3962.2019.03.10]
,LAVOGIEZ Cyril,et al.激光焊接Ti-6Al-4V鈦合金塑性行為的原位SEM/EBSD分析[J].MATERIALS CHINA,2019,(03):279-285.[doi:10.7502/j.issn.1674-3962.2019.03.10]
點(diǎn)擊復(fù)制
In-situ SEM and EBSD Analysis on Plastic Behavior of Laser Beam Welding Ti-6Al-4V Alloy(
)
中國(guó)材料進(jìn)展[ISSN:1674-3962/CN:61-1473/TG]
- 卷:
-
- 期數(shù):
-
2019年第03期
- 頁(yè)碼:
-
279-285
- 欄目:
-
研究報(bào)告
- 出版日期:
-
2019-03-31
文章信息/Info
- Title:
-
激光焊接Ti-6Al-4V鈦合金塑性行為的原位SEM/EBSD分析
- 作者:
-
DANG Ning1; 2; LIU Lingyu3; LAVOGIEZ Cyril2; MAIRE Eric2; MA Chaoli1; ZHOU Lian1; 4
-
(1. School of Materials Science and Engineering,Beihang University, Beijing 100191, China)(2. INSA de Lyon, Mateis UMR 5510, Villeurbanne 69621, France)(3. Baoti Group Co, Ltd,Baoji 721014, China)(4. Northwest Institute for Nonferrous Metal Research, Xian 710016, China)
- Author(s):
-
黨寧1; 2; 劉玲玉3; LAVOGIEZ Cyril2; MAIRE Eric2; 馬朝利1; 周廉1; 4
-
(1. 北京航空航天大學(xué)材料科學(xué)與工程學(xué)院, 北京100191) (2. INSA de Lyon, Mateis UMR 5510, Villeurbanne 69621, France) (3.寶鈦集團(tuán)有限公司，陜西 寶雞 721014)(4.西北有色金屬研究院，陜西 西安 710016)
-
- 關(guān)鍵詞:
-
crystallographic orientation; in-situ SEM; plastic deformation; laser beam welding; Ti-6Al-4V alloy
- Keywords:
-
晶體學(xué)取向; 原位SEM; 塑性變形; 激光焊接; Ti-6Al-4V鈦合金
- DOI:
-
10.7502/j.issn.1674-3962.2019.03.10
- 文獻(xiàn)標(biāo)志碼:
-
A
- 摘要:
-
EBSD and in-situ SEM were used to study the plastic behavior of laser beam welding Ti-6Al-4V. Due to the high weld temperature(exceeding the β-transus) and high cooling rate, β→α′ martensitic transformation occurs. Within the fusion zone, only acicular morphology exists, while in 1st heat affected zone(HAZ) and 2ndHAZ, these acicular laths globalize, which show an obvious microstructural gradient. The result of the insitu plastic deformation shows the deformation can be divided into 2 stages. In the first stage of the deformation, either slipping or twinning can occur. It depends on whether the initial orientation can respect <120>//TA(tensile axis) by rotating the grains or not. While in the second stage, only slipping can be found.
- Abstract:
-
選用原位SEM/EBSD顯微術(shù)分析研究了Ti-6Al-4V鈦合金的焊接區(qū)域的變形行為。研究發(fā)現(xiàn)，由于焊接時(shí)高的焊接溫度(在β相變點(diǎn)之上)和急劇的冷卻速率，導(dǎo)致β→α′ 馬氏體相變的發(fā)生。SEM觀察發(fā)現(xiàn)，在焊縫區(qū)只存在有針狀的α′馬氏體形貌，而在焊接第一熱影響區(qū)和第二熱影響區(qū)，針狀α′相逐漸發(fā)生球化，形成了明顯的顯微組織梯度過(guò)渡。在對(duì)焊接區(qū)域進(jìn)行SEM/EBSD下的原位拉伸實(shí)驗(yàn)后發(fā)現(xiàn)，該區(qū)域的塑性變形可劃分為兩個(gè)階段。變形的第一階段，滑移變形或?qū)\生變形均有可能發(fā)生，這取決于晶粒的初始晶體學(xué)取向是否可通過(guò)旋轉(zhuǎn)來(lái)匹配<120>//TA(拉伸方向)；而在變形的第二階段，只發(fā)生滑移變形。
更新日期/Last Update:
2019-04-03