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Mechanical Engineering - Production Engineering - Discussion

Discussion Forum : Production Engineering - Section 1 (Q.No. 41)
Production Engineering
41.
The machining of titanium is difficult due to
high thermal conductivity of titanium
chemical reaction between tool and work
low tool-chip contact area
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
32 comments Page 2 of 4.
Mln said:   8 years ago
Titanium alloys due to their high strength, low thermal conductivity and chemical reactivity with tool materials (at elevated temperatures), pose a hazard to the tool and significantly reduce the tool life.
Anurag said:   8 years ago
Titanium is high chemical reactivity. So the option B is correct.
Ashok said:   8 years ago
Option A is also right.
Bhavik said:   8 years ago
B is correct answer.

Reference: MANUFACTURING ENGINEERING AND TECHNOLOGY SIXTH EDITION by Serope Kalpakjian.

"Titanium and its alloys have very poor thermal conductivity (the lowest of all
metals), causing a significant temperature rise and built-up edge. They are highly reactive and can be difficult to machine.".
Jaimin Patel said:   8 years ago
The Right Answer is B.
Pankaj Kumar Behera said:   8 years ago
Answer is None of these. Because the titanium has very high strength. Due to low thermal conductivity of material, the heat is not dissipated from the primary deformation zone and chips gets accumulated thereby decreasing the shear plane angle and cutting force increases. This question asked in ESE 1992.
Ritesh Singh said:   1 decade ago
Titanium is very reactive metal. So here option B should be correct.
Govardhan said:   9 years ago
Titanium can chemically bond with cutting tools, causing built up edges on the tool, decreasing the effectiveness of the tool. So option B is correct.
Neeraj said:   9 years ago
B is right answer according to Kalpakjian book.
MD RABNAWAZ QAISAR ANSARI said:   9 years ago
Option C is correct. I agree with the answer.
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